* ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
Email, calendar, collaboration server with Web interface and lots of integrations.
* Lightweight queuing system.
* Application, server, and network management platform based on Zope.
* A versatile deduplicating backup tool.
* Enterprise-class software for monitoring of networks and applications.
Implementation of Microsoft’s protocol.
Server operating system aiming to make self-hosting accessible to everyone.
Keep your browser's bookmarks synchronized without limiting yourself to one provider.
* Lightweight authoritative Name Server with DNSSEC capabilities powering the .eu top-level domain.
* Network monitoring inspired by Big Brother.
* XtreemFS is a fault-tolerant distributed file system for all storage needs.
* Turnkey virtualization platform based on CentOS distribution, using Xen and an extended toolstack/API.
* Virtual machine monitor for 32/64 bit Intel / AMD and PowerPC 970 architectures.
* Based on Citrix XenServer, XCP-ng is a fully open source virtualization platform.
Open source tool for syncing browser data between browsers and devices.
* X2Go is an open source remote desktop software for Linux that uses the NX technology protocol.
* Software deployment, upgrade and removal program for Windows.
* The world's foremost network protocol analyzer.
* Very fast VPN based on elliptic curve and public key crypto. Linux only ; other clients in development.
The most comprehensive and integrated Free / Libre / Open Source enterprise software suite.
Wiki, simple to use and install.
Fast, light and extensible chat client.
* libvirt-based Web interface for managing virtual machines.
* Linux server control panel.
Full-featured IPBX solution built atop Asterisk with integrated Web administration interface and REST-ful API.
* Network-wide installation, configuration and upgrades of Windows based software.
* An open source cross-platform extensible code editor from Microsoft
* Hosting panel for Linux based on webmin.
* Virtualization product from Oracle Corporation.
* A highly configurable text editor built to enable efficient editing.
The to-do app to organize your life.
* Hosting panel for Linux but with Nginx.
* HTTP based web application accelerator focusing on optimizing caching and compression.
* Tool for building complete development environments.
* Another client-server backup system.
Unison is a file-synchronization tool for OSX, Unix, and Windows.
* Validating, recursive, and caching DNS resolver.
* Simple dashboard for sensu.
Linux distro that runs on indie boxes . Single-command installation and management of apps Jenkins, Mediawiki, Owncloud, WordPress, etc., and other features.
TWiki is a Perl-based structured wiki application, typically used to run a collaboration platform, knowledge or document management system, a knowledge base, or team portal.
Totally private personal database and note taking app.
Tuleap is a libre suite to plan, track, code and collaborate on software projects.
* Tsuru is an extensible Platform as a Service software.
Free open source business solution.
Java application to track GPS positions. Supports loads of tracking devices and protocols, has an Android and iOS App. Has a web interface to view your trips.
Trac is an enhanced wiki and issue tracking system for software development projects.
Anonymous microblogging platform.
Open source web-based news feed reader and aggregator.
An open source AJAX-powered chat platform with support for IRC .
Wiki CMS Groupware with the most built-in features.
* TigerVNC is a high-performance, platform-neutral implementation of VNC , a client/server application that allows users to launch and interact with graphical applications on remote machines.
XMPP server implementation in Java.
* Free email application that's easy to set up and customize.
* Multibackend monitoring web interface with support for Naemon, Nagios, Icinga and Shinken.
* Complete lifecycle management tool for physical and virtual servers. FOSS.
Self-hosted web EPUB reader using EPUB.js, Bootstrap, and Calibre.
* Terraform works with many cloud providers and creates infrastructure from code.
* System statistic collection daemon written in Python for OpenTSDB
Taskwarrior is Free and Open Source Software that manages your TODO list from your command line. It is flexible, fast, efficient, and unobtrusive. It does its job then gets out of your way.
Simple but efficient web based task manager written in PHP.
Troubleshooting and real-time monitoring of VoIP-based systems.
Agile Project Management Tool based on the Kanban and Scrum methods.
* secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.
Collaborative knowledge management tool. Create word clouds and link the elements.
* Capture system state and activity from a running Linux instance, then save, filter and analyze.
Syndie is a libre system for operating distributed forums.
Secure file sync software for arbitrary storage backends, an open-source cloud storage and filesharing application. Securely synchronize your files to any kind of storage.
* – Still developed predecessor to Claws Mail, lightweight mail client.
* A highly available, distributed, eventually consistent object/blob store.
* Client-server revision control system.
* Complete IPsec implementation for Linux.
* Staytus is a complete solution for publishing the latest information about any issues with your web applications, networks or services.
* A modern status page for presenting critical service updates.
* Status page for cloud services and APIs.
Simple and private notes app. Protect your privacy while getting more done. That's Standard Notes.
* Event Driven Operations and ChatOps platform for infrastructure management. Written in Python.
Another browser-based IMAP client.
Caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages.
* Library that implements a self-contained, serverless, zero-configuration, transactional SQL DBS.
Publication system for the Internet aimed at collaborative work, multilingual environments, and simplicity of use for web authors.
* A flexible package manager that supports multiple versions, configurations, platforms, and compilers.
Sorcia is a minimalist web frontend for Git repositories with fine-grained user access controls, multiple themes to choose based on your taste and many more.
* Multi-protocol software VPN with advanced features
Have every single event, from your websites, mobile apps, desktop applications and server-side systems, stored in your own data warehouse and available to action in real-time.
* Asset & license management software.
* – Snapshot backup with global multi-client deduplication and transparent compression.
* A private certificate authority and related tools for secure automated certificate management.
Complete mailserver solution leveraging the Nix Ecosystem.
Easy to use CMS with powerful MVC framework underlying.
Open Source CCTV software written in Node with both IP and local camera support.
* Another monitoring framework.
* A distributed Blockdevice, Rest, QEMU and distributed Filesystem storage.
* Control panel for Linux, BSD, and Windows based on ZPanel.
The easiest way to share and manage your Git, Mercurial and Subversion repositories over http.
GPG-enabled mailing list manager with resending-capabilities.
Allow remote clients to access image acquisition devices available on the local host.
* – Active Directory and CIFS protocol implementation.
* It's written in Python.
Rygel is a UPnP AV MediaServer that allows you to easily share audio, video, and pictures. Media player software may use Rygel to become a MediaRenderer that may be controlled remotely by a UPnP or DLNA Controller.
* Simple orchestration tool.
* Filesystem Snapshotting Utility.
* Industry standard, high performance data logging and graphing system for time series data.
RosarioSIS, free Student Information System for school management.
* PHP task runner and deployment tool.
* Flexible and fast events processor allowing complex events/metrics analysis.
* Another fault-tolerant key-value NoSQL database.
RhodeCode is an open source platform for software development teams. It unifies and simplifies repository management for Git, Subversion, and Mercurial.
* Available as free software under the MIT License.
* Distributed document store database, focuses on JSON.
* Secure, remote backup tool. Designed to be easy, fast, verifiable and efficient.
ResourceSpace open source digital asset management software is the simple, fast, and free way to organise your digital assets.
* A Feature rich remote desktop application for linux and other unixes.
Send release notifications for starred Github repos.
Redmine is a flexible project management web application.
* Networked, in-memory, key-value data store with optional durability.
Simple media server software, with the aim of being fully compliant with DLNA/UPnP-AV clients. Formerly known as MiniDLNA.
* An easy A remote incremental backup of all your files.
* Another network device configuration management tool.
* a command line program to sync files and directories to and from several cloud storage systems/providers.
* Document based database with ACID/Transactional features.
Raneto is an open source Knowledgebase platform that uses static Markdown files to power your Knowledgebase.
* Monitors network device's configuration and maintain history of changes.
* Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.
* Robust, fully featured, cross distro queuing system.
Stable, full-featured, easy-to-install mail server based on qmail.
Secure Sendmail replacement.
* QEMU is a generic machine emulator and virtualizer.
* Small web-based monitoring dashboard for linux.
* It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
A promising password managers fully featured for teams.
* Virtualization management solution.
Feature-rich and easy to configure XMPP server.
* Service monitoring system and time series database.
A complete, mature, multi-user project management system with extensive functionality for all phases of a project.
Non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk.
* OpenVPN based solution. Easy to set up.
Django based ticket sales platform for events.
* DNS server with a variety of data storage back-ends and load balancing features.
* Friendly web-based DNS administration tool for PowerDNS server.
Light-weight reverse proxy and load balancer for HTTP/HTTPS.
* Object-relational database management system .
* Scalable PostgreSQL-based database cluster.
Fast, easy to administer, and secure Sendmail replacement.
* Simple management UI for Docker.
* An identity and context aware access-proxy inspired by BeyondCorp.
Wiki-based system for collaborative creation and maintenance of websites.
Powerful open-source CMS system.
Federated microblogging server, Mastodon, GNU social, & ActivityPub compatible.
DIY anonymous offline file-sharing and communications system built with free software and inexpensive off-the-shelf hardware.
feature rich open source email archiving solution.
* A blackhole for Internet Advertisements with a gui for managing and monitoring
* A customizable PHP script that displays information about your system nicely.
PHPOffice contains libraries which permits to write and read files from most office suites.
* Newsletter manager written in PHP.
* Open source IP address management with integration.
* Open source tool to monitor your servers and websites
Web 2.0 Photo Gallery Done Right via Static JSON and Dynamic Javascript.
* Code review tool build by facebook and used by WikiMedia, FB, dropbox etc. Comes with an integrated wiki, bug tracker, VC integration and a CLI tool called arcanist.
* Lightweight, distributed system performance and analysis framework.
* Enhanced, drop-in MySQL replacement.
Simple password manage with sharing features by group and user, but no administration interface.
* Infrastructure definition, configuration and management via a Clojure DSL.
* Full stack, cross distro packaging software .
* Captures network traffic and displays it in a custom Kibana dashboard for easy viewing.
* A tool for creating identical machine images for multiple platforms from a single source configuration.
Oxwall is used for a wide range of projects starting from family sites and custom social networks to collaboration tools and enterprise community solutions.
* Manages virtual machines, storage and virtual networks.
* Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH.
Secure SIP telephony setup with ZRTP encryption.
* Secure identity management solution providing REST based services for authentication and authorization.
* A Secure Distributed File System built for offline operation.
OrangeHRM is a comprehensive HRM system that captures all the essential functionalities required for any enterprise.
* Hardware and software inventory, deployment, and patching for Linux and Windows.
* Container-based virtualization for Linux.
* Uses a custom security protocol that utilizes SSL/TLS for key exchange.
* Store and server massive amounts of time series data without losing granularity.
Open and free bittorrent tracker. It aims for minimal resource usage and is intended to run at your wlan router.
* Build private and public clouds.
Secure SMTP server implementation from the OpenBSD project.
* PaaS product from Red Hat.
* Builds open-source infrastructure management software and implements cloud systems.
* Flexible enterprise cloud made simple.
Openmeetings provides video conferencing, instant messaging, white board, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming.
* Developed by the OpenLDAP Project.
* A Simple Identity layer on top of OAuth 2.0.
Entry-level fleet tracking system. Supports variety of tracking devices and protocols. Comes with rich web-interface and reporting features.
* Another directory server written in Java.
* Distributed network file system with read-only replicas and multi-OS support.
Self-Hosted alternative to Twitch and Youtube Live for live and on-demand video streaming.
* The Open Monitoring Distribution.
Oddworks is an open source video distribution platform built to destroy the barriers to streaming television with SDKs for Roku, Apple iOS/tvOS, Google Android, and Amazon FireTV.
* Log Management Solution .
* Cisco AnyConnect-compatible VPN server
* Enables users to inventory their IT assets.
* SNMP monitoring for servers and networking devices. Runs on linux.
* Extensible mail client.
* A realtime distributed messaging platform.
* Authoritative only, high performance, simple name server.
Noosfero is a web platform for social and solidarity economy networks with blog, e-Portfolios, CMS, RSS, thematic discussion, events agenda and collective intelligence for solidarity economy in the same system.
* Reverse proxy, load balancer, HTTP cache, and web server.
Newspipe is a web news aggregator and reader.
* Distributed, real-time, performance and health monitoring for systems and applications. Runs on Linux, FreeBSD, and MacOS.
Neos or TYPO3 Neos is a modern, open source CMS.
* Easy to use, customizable text editor.
* Computer system, network and infrastructure monitoring software application.
* Network monitoring tool based on the Nagios 4 core with performance enhancements and new features.
Simple way to manage your todo list in AJAX style. Uses PHP, jQuery, SQLite/MySQL. GTD compliant.
* Small but very powerful text-based mail client.
* Webserver-based repository of packages and package metadata, that allows macOS administrators to manage software installs.
* Networked resource monitoring tool.
* Network utility that combines traceroute and ping.
* Fault tolerant, network distributed file system.
Moodle is a learning and courses platform with one of the largest open source communities worldwide.
* Small utility for managing and monitoring Unix systems.
* Another document-oriented database system.
Advanced, easy to use and extensible WikiEngine with a large community of users.
* Application level, network distributed file system.
* A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.
* Really fast deployer and server automation tool .
* A modern and intuitive terminal-based text editor
* Develop and run resource-efficient distributed systems.
* Another distributed revision control.
MediaWiki is a free and open-source wiki software package written in PHP. It serves as the platform for Wikipedia and the other Wikimedia projects, used by hundreds of millions of people each month.
Free software media publishing platform that anyone can run. You can think of it as a decentralized alternative to Flickr, YouTube, SoundCloud, etc.
* Ruby framework to manage server orchestration, developed by Puppet labs.
Free Open Source Electronic Document Management System. An electronic vault for your documents with preview generation, OCR, and automatic categorization among other features.
Leading open-source analytics platform that gives you more than just powerful analytics, formerly known as Piwik.
Online markdown editor/viewer.
* Community-developed fork of the MySQL.
MailyGo is a small tool written in Go that allows to send HTML forms, for example from static websites without a dynamic backend, via email.
The Gnu mailing list server.
Disposable email SMTP server, also useful for development.
* – a container "hypervisor" and a better UX for LXC.
* Userspace interface for the Linux kernel containment features.
* Parallel distributed file system, generally used for large-scale cluster computing.
Let's Upload that FIle, client-side encrypted.
* Tool for managing events and logs.
* A robot companion for your company's chat room.
* Aims to provide an open source solution to Sublime Text
* Web server more optimized for speed-critical environments.
* The next generation code editor.
* Fully featured network monitoring system that provides a wealth of features and device support.
* Libravatar is a service which delivers your avatar to other websites.
Web frontend from Salut à Toi.
* Unstructured object/data storage and a highly available, distributed, eventually consistent storage system.
LazyLibrarian is a program to follow authors and grab metadata for all your digital reading needs. It uses a combination of Goodreads Librarything and optionally GoogleBooks as sources for author info and book info.
* Linux kernel virtualization infrastructure.
Groupware suite including e-mail, calendars, tasks, todos and notes. Featuring a modern WebApp, DeskApp and mobile access over Z-Push/ActiveSync.
Kontalk is an Open Source Messenger, similar to WhatsApp , including end-to-end encryption, server is based on Tigase XMPP Server.
Kolab community is a unified communication and collaboration system.
* High performance authoritative-only DNS server.
Kinto is a minimalist JSON storage service with synchronisation and sharing abilities.
* Visualize logs and time-stamped data.
* IDE by the people behind KDE.
Host awesome karaoke parties where everyone can easily find and queue songs from their phone's web browser. The player is also browser-based with support for MP3+G, MP4 and WebGL visualizations.
Source code management system that supports two leading version control systems, Mercurial and Git, with a web interface.
* Extremely high performance publish/subscribe message system.
* – Python script for downloading and silently installing MSI files.
* Cloud orchestration tool which manages services as charms, YAML configuration and deployment script bundles.
Jirafeau is a web site permitting to upload a file in a simple way and give an unique link to it.
Free and universal communication platform which preserves the user's privacy and freedoms .
* Complete ITIL web based service management tool.
* Hosting control panel for Linux.
Full-featured mail server solution based on Postfix and Dovecot.
Expose your local endpoints to the Internet with a Kubernetes integration, Docker image and CLI available.
* Distributed time series database with no external dependencies.
Open source CalDAV/CardDAV web client implementation.
* Sign in with your domain name .
HORDE application that provides webmail access to IMAP and POP3 accounts.
* – Simple IMAP migration tool for copying mailboxes to other servers.
* Nagios fork that has since lapped nagios several times. Comes with the possibility of clustered monitoring
* Code editor awesomeness, built with common web languages.
streaming audio/video server which can be used to create an Internet radio station or a privately running jukebox and many things in between.
* IT Documentation and CMDB.
* C++ based BigTable-like DBMS, communicates through Thrift and runs either as stand-alone or on distributed FS such as Hadoop.
Decentralized identity, privacy, publishing, sharing, cloud storage, and communications/social platform.
* A customizable, life embetterment robot.
* HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, *inclusive* of documentation.
Your very own offline-first privacy-centric open-source data-center.
* Stream processing system which may be used for log aggregation .
* Prioritises security, simplicity and performance.
* Monitoring for cron jobs, background services and scheduled tasks.
* Distributed, scalable, and portable file-system written in Java for the Hadoop framework.
Hackable time series pattern recognition tool with UI for Grafana.
* Markdown editor with live preview.
* Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.
Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC and RDP.
* – bootable Debian Live CD with powerful CLI tools.
* Pluggable Log and Event Analysis Server with Alerting options.
* Scalable graphing server.
* A Graphite & InfluxDB Dashboard and Graph Editor.
* Another build automation system.
Free software framework for decentralized, peer-to-peer networking.
Social communication software for both public and private communications.
* The most popular automation build tool for many purposes.
Running music community websites, alternative to last.fm.
* An extensible, customizable text editor-and more.
* Distributed revision control system sponsored by Canonical.
* Scale-out network-attached storage file system.
* Information Resource-Manager with an additional Administration Interface.
Self Hosted Git repository management, code reviews, issue tracking, activity feeds and wikis.
Gitlab's built-in, full-featured CI/CD solution. (
* Distributed revision control and source code management with an emphasis on speed.
File synchronization between computers, servers, external drives.
GIST is an open-source application to share code.
* Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.
* Fast multi-language queuing/job processing platform.
* High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.
* Cluster virtual server management software tool built on top of KVM and Xen.
Galette is a membership management web application towards non profit organizations.
* Galera Cluster for MySQL is an easy-to-use high-availability solution with high system up-time, no data loss, and scalability for future growth.
* Improve the Management of the services and the company directory based on OpenLDAP.
Modern, web-based, convivial, multi-user and free music server.
Extract article content from news sites and blogs and convert RSS feeds that contain only extracts of stories to full-text feeds. Developed by FiveFilters.org.
* Easy to use panel for Linux with Nginx and PHP-FPM support.
Scalable open source cross-platform telephony platform.
* High performance and highly configurable multi-protocol policy/authentication server, supporting RADIUS, DHCPv4 and VMPS.
Web-based open source GUI that controls and manages Asterisk.
* Based on 389-DS. Includes Kerberos, DNS, as well as host based access control.
Community project to develop, design and promote personal servers running free software for private, personal, communications.
Home server configuration based on Debian.
Online service for planning an appointment or make a decision quickly and easily: Make a poll, Define dates or subjects to choose, Send the poll link to your friends or colleagues, Discuss and make a decision.
* Distributed version control with built-in wiki and bug tracking.
Powerful, flexible, free and open source PHP/MySQL script to manage your forms and data.
* Another computer cloning solution.
* Distributed log collection and aggregation system.
* Log Collector and Shipper.
Small Javascript file that fetches Markdown files and renders them as full pages.
* Monitoring notification routing & event processing system.
* True universal database.
FHEM is used to automate common tasks in the household like switching lamps and heating. It can also be used to log events like temperature or power consumption. You can control it via web or smartphone frontends, telnet or TCP/IP directly.
Feed2toot parses a RSS feed, extracts the last entries and sends them to Mastodon.
* VPS Provisioning and Management Software.
* Time series data visualization and graphing software written in Go.
* Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
* A lightweight and simple dashboard monitor for Linux, available in Web and Bash application.
* Open Source XML Database
Message transfer agent developed at the University of Cambridge.
* Private cloud software with AWS compatibility.
* a plugin based chatbot designed to be easily deployable, extensible and maintainable.
* Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem.
Simple yet advanced screenshot uploading and link shortening service.
* Java based database, popular with log aggregation, and email archiving projects.
* the world's most popular IRC bot, designed for flexibility and ease of use, and is freely distributable under the GNU GPL.
The Open edX platform is open-source code that powers edX.org.
* IDE written in Java with an extensible plug-in system.
* EasyBuild builds software and modulefiles for High Performance Computing systems in an efficient way.
* Encrypted bandwidth-efficient backup using the rsync algorithm.
* Multiple backends, encryption, web-ui and multi-OS backup tool.
Advanced open source content management platform.
* Distributed Replicated Block Device.
Take control over your blog.
* Manage your domains and other internet assets in a central location.
* Platform for developers and sysadmins to build, ship, and run distributed applications.
* Manage cluster of Docker Engines.
* Define and run multi-container Docker applications.
* A lightweight service providing DNS, DHCP and TFTP services to small-scale networks.
* Opinionated platform for seamlessly managing your DNS configuration across any number of DNS hosts, both in the cloud or in your own infrastructure.
* A collection of DNS applications, including tinydns.
* DNS REST API that support several DNS servers as its backend.
Server for calendar sharing that uses a PostgreSQL database as a data store.
Powerful decentralized file sharing applications built from a large ecosystem of modules.
* Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.
* Patch-based distributed version control
* Mailing List Manager, written in Perl.
Your own video sharing website with CumulusClips video sharing script. You can build a YouTube clone where users can upload, rate, comment on videos, and much more.
High performance RTMP/RTSP streaming server.
* The CC1 system provides a complete solution for Private Cloud Computing.
Personal cloud where you can read your emails or manage and sync your contact, files or calendars, with an app store full of community contributions.
Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services.
Real time mobile and web analytics, crash reporting and push notifications platform.
* Ease of use, with multi-master replication document-oriented database system.
* Flexible DNS server written on Go.
Coquelicot is a “one-click” file sharing web application with a focus on protecting users’ privacy.
* Provides the core functionality for centrally managing your KVM or Xen virtualized environment.
* Consul is a tool for service discovery, monitoring and configuration.
Commento is a discussion platform that you can embed on your blog, news articles, and any place where you want your readers to add comments.
* At Tumblr, it's the infrastructure source of truth and knowledge.
* High precision system performance metrics collecting tool.
* System statistic collection daemon.
* New multi-server web interface for Linux servers written in C.
* Cobbler is a Linux installation server that allows for rapid setup of network installation environments.
Open source content management system, faster and easier management of website contents, scalable for small businesses to large corporations.
* Cloud computing software for creating, managing, and deploying infrastructure cloud services.
* Flow-based orchestration tool for managing deployed applications, with Docker capabilities.
* TOSCA-based cloud orchestration software platform written in Python and YAML.
* A Platform-as-a-Service suite to provide the orchestration services that make distributed apps a powerhouse of awesomeness.
* Partition and disk imaging/cloning program.
* Old school email client , based on GTK+.
Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more.
* – Windows CLI package manager written in .NET/PS, based on .
* Lightweight, high-performance web server/reverse proxy.
* It's written in Ruby and Erlang and uses a pure-Ruby DSL.
* Collection of extensions for Nagios.
SMTP server with a focus on simplicity, security, and ease of operation.
* Lightweight agent system. Configuration state is specified via a declarative language.
* Distributed object store and file system.
* Distributed DBMS designed to handle large amounts of data across many servers.
* Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH .
* A set of open source formats, protocols, and software for modeling, storing, searching, sharing and synchronizing data.
Python-based CalDAV and CardDAV server, forked from Radicale.
E-book library manager that can view, convert, and catalog e-books in most of the major e-book formats and provides a built-in Web server for remote clients.
* Lightweight, general-purpose web server supporting HTTP/2, automatic TLS and easy configuration. Written in Go.
* Web-based network monitoring and graphing tool.
* Status page system written in PHP.
* Monitoring and alerts, similar to PagerDuty.
* Network backup and restore program.
Workflowy / Dynalist clone with Kanban and Calendar functionality. Organize everything.
General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.
Tools, libraries, services and a community to build user-to-user, group and social messaging into your app. Saves time. Scales up. Supports you.
A self-hosted Bitcoin and other cryptocurrencies payment processor.
* Code editor for web designers and front-end developers.
* A personal SSL Key / Certificate Authority web-based tool for creating self-signed certificates.
* IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.
A web-based calendar and resource scheduling system that allows administered management of reservations on any number of resources.
* A Do-it-Yourself monitoring framework built to gather metrics, mine data and report on the systems in your network.
* Bloonix is a monitoring solution that helps businesses to ensure high availability and performance.
* The most widely used name server software.
* A simple, fast work queue.
bbPress is forum software with a twist from the creators of WordPress. Easily setup discussion forums inside your WordPress.org powered site.
* Backup and Recovery Manager for disaster recovery of PostgreSQL servers.
* A fork of Bacula backup tool.
* BackupPC is a high-performance system for backing up to disk.
* Lightweight, extensible meta-backup system.
* A hackable text editor from Github.
Easy to use but advanced IP PBX system, VoIP gateway and conference server.
* XMPP based virtualization management platform.
* Most popular web server.
* Build automation tool mainly for Java.
* Hadoop database, a distributed, big data store.
* Apache Software Foundation project written in Java.
* Automation build tool, similar to make, written in Java.
* It's written in Python and manages the nodes over SSH.
Open Source Social Networking Framework and Platform.
* Client-server model backup tool.
* Web/application server that supports Lua, live-reload, templates, Sass and HTTP/2.
The open source Enterprise Content Management software that handles any type of content, allowing users to easily share and collaborate on content.
* Control panel for Linux and BSD.
Collabora Online Development Edition is a powerful LibreOffice-based online office that supports all major document, spreadsheet and presentation file formats, which you can integrate in your own infrastructure.