Airesis
eDemocracy
consul
open government and participation software
Coursemology
open-source gameified learning platform
Errbit
open source, self-hosted error catcher
Fairmondo
free market place in the hand of the users
GitLab
self hosted Git management
Hours
Time registration that doesn't suck.
icare
carpooling platform
Locomotive CMS
a multisite CMS with liquid templating
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
pinballmap.com
source code to pinballmap.com
planningalerts.org.au
planning alerts for Australians
sharetribe
Marketplace platform
Trado
simple e-commerce platform for developers
Upcase.com
learning platform for programming