Abalone
data tracking and analytics for conservation efforts
AgileVentures
source code to agileventures.org
Airesis
eDemocracy
alonetone
home for musicians, their tracks and albums
AppPerf
application and performance monitoring tool
Barong
auth server
Calls For Proposal App
manage a conference CFP
Catarse
open-source crowdfunding platform
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
Classroom
automates repository creation and access control for teachers
CodeCuriosity.org
platform to reward OSS contributors
Coderwall
Professional network for software engineers
CodeTriage
directory of open-source projects with open issues
Coinfi
crypto market intelligence platform
consul
open government and participation software
Convene
digital spaces
Covidlist
connect vaccinations with those who need to be vaccinated
Coyote
image annotation
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
Datoji
easy JSON mocking for developers
DCAF Case Management
case management system
Decidim
a framework for democracy
Discourse
next-generation discussion platform
dokno
Rails Engine for storing and managing an app's domain knowledge
Droptune
music notifications for Spotify and Apple Music
ebwiki.org
database of police abuse cases against people of color
Email Dashboard
email suite for marketing and CRM
Fairmondo
free market place in the hand of the users
Feedbin
open-source feed reader for multiple platforms
forem
the platform that powers dev.to
GitReports.com
allow anonymous users to submit bugs to GitHub repos
Growstuff
tool for small-scale food growers
Helpy
A Modern Helpdesk Alternative
Hitobito
full-scale group hierarchy management
Human Essentials
management system for essentials banks
icare
carpooling platform
iNaturalist.org
social network for nature stuff
Lale Help
collaborative platform for refugee support
LearnAwesome.org
social network of learners
libraries.io
open-source discovery service
lobsters
link-aggregation site, inspired by Hacker News
Loomio
make decisions together
Mastodon
distributed, interconnected microblogging
Motor Admin
if ActiveAdmin and Blazer had a baby
nindika.com
nintendo switch e-shop
Open Build Service
build service for Linux packages
OpenFarm
open database for farming and gardening knowledge
Open Source Billing
Beautifully Simple Billing Software
Open-Source Event Manager
event management tool tailored to conferences
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
Outpost
service directories platform
Peatio
crypto currency exchange software
Pig CI
Rails performance monitoring, plus CI
Punchclock
simple electronic punch clock
Pupilfirst
everything you need for an online school
ShinyCMS
plugin-based CMS
SmartVPN Billing
billing management for hosting
Snippet Manager
manage your snippets
sumofus.org
source code to sumofus.org
TalentProtocol.com
be your own NFT
TaxonWorks
workbench for biodiversity informatics
Teambox
the original teambox.com
TimeOverflow
time banking system
Trado
simple e-commerce platform for developers
va.gov
API for va.gov
vglist.co
video game library tracking
weg.li
report bad german parkers
WikiEduDashboard
course dashboard system
World Cube Association
everything for the World Cube Association
Wreeto
note-taking, knowledge management, and wiki
zammad
enterprise-ready helpdesk and customer support system