ActiveWorkflow.org
turn complex requirements to workflows
AgileVentures
source code to agileventures.org
Amahi
your personal cloud and media server
Central
Fulcrum project planning tool fork
Coursemology
open-source gameified learning platform
DCAF Case Management
case management system
Duckrails
tool to mock API endpoints
Fae CMS
another CMS
GitLab
self hosted Git management
GitReports.com
allow anonymous users to submit bugs to GitHub repos
Growstuff
tool for small-scale food growers
Hitobito
full-scale group hierarchy management
huginn
open-source IFTTT
Human Essentials
management system for essentials banks
Juvia
commenting server of the likes of Discus or IntenseDebate
Lale Help
collaborative platform for refugee support
OpenProject
project management system
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
pinballmap.com
source code to pinballmap.com
Punchclock
simple electronic punch clock
Pupilfirst
everything you need for an online school
Trado
simple e-commerce platform for developers
WikiEduDashboard
course dashboard system
World Cube Association
everything for the World Cube Association