Mastodon
Federated microblogging server.
Huginn
Build agents that monitor and act on your behalf.
Overleaf
Web-based collaborative LaTeX editor.
Spree Commerce
Spree is a complete, modular & API-driven open source e-commerce solution for Ruby on Rails.
Gollum
Simple, Git-powered wiki with a sweet API and local frontend.
diaspora*
Distributed social networking server.
Canvas LMS
Learning management system (LMS) that is revolutionizing the way we educate.
Standard Notes
Simple and private notes app.
Zammad
Easy to use but powerful open-source support and ticketing system.
Stringer
Work-in-progress self-hosted, anti-social RSS reader.
OpenStreetMap
Collaborative project to create a free editable map of the world.
Publify
Simple but full featured web publishing software.
Open Food Network
Online marketplace for local food.
Tracks
Web-based application to help you implement David Allen’s [Getting Things Done™](https://en.wikipedia.org/w…
Haven
Private blogging system with markdown editing and built in RSS reader.
hitobito
Manage complex group hierarchies with members, events and a lot more.
qpixel
Q&A-based community knowledge-sharing software.
ArchivesSpace
Archives information management application for managing and providing Web access to archives, manuscripts…
Samvera Hyrax
Front-end for the Samvera framework, which itself is a Ruby on Rails application for browsing and managing…
ACP Admin
CSA administration.
Noosfero
Platform for social and solidarity economy networks with blog, e-Portfolios, CMS, RSS, thematic discussion,…
Redmine
Flexible project management web application.
Schleuder
GPG-enabled mailing list manager with resending-capabilities.