ActiveWorkflow.org
turn complex requirements to workflows
Catarse
open-source crowdfunding platform
Classroom
automates repository creation and access control for teachers
Diaspora
community-run, distributed social-network
FederalRegister.gov
daily journal for the United States Government
getsiteinspector.com
a tool for developers to check their pages
GitLab
self hosted Git management
huginn
open-source IFTTT
libraries.io
open-source discovery service
Octobox
GitHub notification manager
planningalerts.org.au
planning alerts for Australians
va.gov
API for va.gov