AirCasting
platform for gathering, visualization and sharing of environmental data
Amahi
your personal cloud and media server
Astuto
customer feedback tool
Autolab
course management and auto-grading of assignments
Brimir
an email helpdesk
CodeTriage
directory of open-source projects with open issues
Coyote
image annotation
Danbooru
taggable image board
Discourse
next-generation discussion platform
Drug Gene Interaction Database
The Genome Institute's drug gene interaction database
ebwiki.org
database of police abuse cases against people of color
Ekylibre
farm management information system
Envizon
network visualization and pentest reporting
Errbit
open source, self-hosted error catcher
Expertiza
peer-reviews app, supported by the National Science Foundation
Fae CMS
another CMS
getsiteinspector.com
a tool for developers to check their pages
Growstuff
tool for small-scale food growers
Helpful
simple and elegant support system
Lale Help
collaborative platform for refugee support
Loomio
make decisions together
Octobox
GitHub notification manager
Open Source Billing
Beautifully Simple Billing Software
pinballmap.com
source code to pinballmap.com
planningalerts.org.au
planning alerts for Australians
PublicLab.org
collaborative knowledge-exchange platform
Racing On Rails
bike racing association management
Reservations
equipment loans and reservations software
StockAid
manages inventory for the Grateful Garment Project
TaxonWorks
workbench for biodiversity informatics
whitehall
government content publishing for gov.uk
WikiEduDashboard
course dashboard system
World Cube Association
everything for the World Cube Association