AdvogatoW
Advogato

Advogato was an online community and social networking site dedicated to free software development and created by Raph Levien. In 2007, Steve Rainwater took over maintenance and new development from Raph. In 2016, Rainwater's running instance was shut down and backed up to archive.org. In October 2017, S. Ye took over from a backup copy in 2016 to re-enact a running instance for other researchers still interested in mod_virgule.

CoCalcW
CoCalc

CoCalc is a web-based cloud computing (SaaS) and course management platform for computational mathematics. Part of the Sage project, it supports editing of Sage worksheets, LaTeX documents and Jupyter notebooks. CoCalc runs an Ubuntu Linux environment that can be interacted with through a terminal, additionally giving access to most of the capabilities of Linux.

Free Software MagazineW
Free Software Magazine

Free Software Magazine is a Web site that produces a mostly free-content online magazine about free software.

FriendicaW
Friendica

Friendica is a free and open-source software distributed social network. It forms one part of the Fediverse, an interconnected and decentralized network of independently operated servers.

GiteaW
Gitea

Gitea is an open-source forge software package for hosting software development version control using Git as well as other collaborative features like bug tracking, wikis and code review. It supports self-hosting but also provides a free public first-party instance hosted in China on DiDi's cloud. It is a fork of Gogs and is written in Go. Gitea can be hosted on all platforms supported by Go including Linux, macOS, and Windows. The project is funded on Open Collective.

GNU socialW
GNU social

GNU social is a free and open source software microblogging server written in PHP that implements the OStatus standard for interoperation between installations. While offering functionality similar to Twitter, GNU social seeks to provide the potential for open, inter-service, and distributed communications between microblogging communities. Enterprises and individuals can install and control their own services and data.

Gpl-violations.orgW
Gpl-violations.org

The gpl-violations.org is a not-for-profit project founded and led by Harald Welte in 2004. It worked to make sure software licensed under the GNU General Public License was not used in ways prohibited by the license.

GroklawW
Groklaw

Groklaw was a website that covered legal news of interest to the free and open source software community. Started as a law blog on May 16, 2003 by paralegal Pamela Jones ("PJ"), it covered issues such as the SCO-Linux lawsuits, the EU antitrust case against Microsoft, and the standardization of Office Open XML.

Launchpad (website)W
Launchpad (website)

Launchpad is a web application and website that allows users to develop and maintain software, particularly open-source software. It is developed and maintained by Canonical Ltd.

Mastodon (software)W
Mastodon (software)

Mastodon is free and open-source software for running self-hosted social networking services. It has microblogging features similar to the Twitter service, which are offered by a large number of independently run Mastodon nodes, each with its own code of conduct, terms of service, privacy options, and moderation policies.

Open HubW
Open Hub

Black Duck Open Hub, formerly Ohloh, is a website which provides a web services suite and online community platform that aims to index the open-source software development community. It was founded by former Microsoft managers Jason Allen and Scott Collison in 2004 and joined by the developer Robin Luckey. As of 15 January 2016, the site lists 669,601 open-source projects, 681,345 source control repositories, 3,848,524 contributors and 31,688,426,179 lines of code.

OSDNW
OSDN

OSDN is a web-based collaborative development environment for open-source software projects. It provides source code repositories and web hosting services. With features similar to SourceForge, it acts as a centralized location for open-source software developers.

PeerTubeW
PeerTube

PeerTube is a free and open-source, decentralized, federated video platform powered by ActivityPub and WebTorrent, that uses peer-to-peer technology to reduce load on individual servers when viewing videos.

SourceForgeW
SourceForge

SourceForge is a web service that offers software consumers a centralized online location to control and manage open-source software projects and research business software. It provides source code repository hosting, bug tracking, mirroring of downloads for load balancing, a wiki for documentation, developer and user mailing lists, user-support forums, user-written reviews and ratings, a news bulletin, micro-blog for publishing project updates, and other features.

ZemblyW
Zembly

Zembly was a browser-based development environment from Sun Microsystems that enabled social programming of applications for Facebook, Meebo, OpenSocial, iPhone web applications, and other social platforms, as well as web widgets. Users of zembly interacted with one another via zembly's social networking features to engage in co-development of applications for these platforms. It was available from 2008–2009.