Abalone
data tracking and analytics for conservation efforts
AgileVentures
source code to agileventures.org
Airesis
eDemocracy
Alaveteli
easy FOIA requests for any jurisdiction
Autolab
course management and auto-grading of assignments
Chaskiq
full-featured live chat, support, and marketing platform
Chatwoot
customer engagement platform
CircuitVerse.org
circuit simulator
Clain for Crown Court Defense
advocacy for defense payments
consul
open government and participation software
Convene
digital spaces
Coursemology
open-source gameified learning platform
Coyote
image annotation
CrimeThinc.com
the app that powers this website
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
Danbooru
taggable image board
DCAF Case Management
case management system
Diaspora
community-run, distributed social-network
ebwiki.org
database of police abuse cases against people of color
Errbit
open source, self-hosted error catcher
exercism.io
code practice and mentorship
forem
the platform that powers dev.to
getsiteinspector.com
a tool for developers to check their pages
Growstuff
tool for small-scale food growers
Hitobito
full-scale group hierarchy management
Human Essentials
management system for essentials banks
icare
carpooling platform
if-me.org
mental health communication
iNaturalist.org
social network for nature stuff
lobsters
link-aggregation site, inspired by Hacker News
Mastodon
distributed, interconnected microblogging
Morph.io
web scraping tool
Motor Admin
if ActiveAdmin and Blazer had a baby
nindika.com
nintendo switch e-shop
nokul
solution for universities to manage all the complex procedures of a university online
Open Build Service
build service for Linux packages
OpenFoodNetwork
software to manage the lifecycle of food
OpenProject
project management system
Open-Source Event Manager
event management tool tailored to conferences
openstreetmap.org
crowd-sourced map of the world
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
Panoptes
API to support user-defined research projects
planningalerts.org.au
planning alerts for Australians
Postal
mail delivery platform for incoming and outgoing e-mail
PublicLab.org
collaborative knowledge-exchange platform
Pupilfirst
everything you need for an online school
Racing On Rails
bike racing association management
rubygems.org
The Ruby community's gem hosting service
rubytoolbox.com
catalog of all Rubygems that keeps track of popularity and health metrics
samson
Web interface for deployments
sharetribe
Marketplace platform
ShinyCMS
plugin-based CMS
Skyderby
flight analysis and competition scoring
Splits.io
speedrunning data and analysis
TaxonWorks
workbench for biodiversity informatics
Texterify.com
translation and localization management
TheOdinProject.com
free web development courses
TimeOverflow
time banking system
tip4commit.com
reward contributors
va.gov
API for va.gov
vglist.co
video game library tracking
visualizer.coffee
visualize hipster coffee machines
WikiEduDashboard
course dashboard system
zammad
enterprise-ready helpdesk and customer support system