ActiveWorkflow.org
turn complex requirements to workflows
adopt-a-hydrant
adopt-a-hydrant software
AgileVentures
source code to agileventures.org
Alaveteli
easy FOIA requests for any jurisdiction
alonetone
home for musicians, their tracks and albums
Autolab
course management and auto-grading of assignments
Bike Index
the internet's bike registry
Black Candy
self-hosted music streaming server
brief-ideas
journal for brief ideas
Canvas LMS
enterprise-grade learning management system
Central
Fulcrum project planning tool fork
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
CodeTriage
directory of open-source projects with open issues
Coinfi
crypto market intelligence platform
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
Diaspora
community-run, distributed social-network
Discourse
next-generation discussion platform
ebwiki.org
database of police abuse cases against people of color
Ekylibre
farm management information system
exercism.io
code practice and mentorship
Fairmondo
free market place in the hand of the users
Feedbin
open-source feed reader for multiple platforms
FleetYards
A Ship Database and Web API based on the official Star Citizen Ship Matrix
forem
the platform that powers dev.to
fromthepage.com
crowdsource handwritten documents
Gamocosm.com
Minecraft server hosting
getsiteinspector.com
a tool for developers to check their pages
GitLab
self hosted Git management
GitReports.com
allow anonymous users to submit bugs to GitHub repos
Hackathon Manager
hackathon registration and logistics
Heaven
github flow orchestrator
Helpful
simple and elegant support system
Hitobito
full-scale group hierarchy management
Hound
Your code, always in style.
Hours
Time registration that doesn't suck.
huginn
open-source IFTTT
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
LumenDatabase
database of legal complaints and requests for removals
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
Octobox
GitHub notification manager
OneBody
church management software
Open Build Service
build service for Linux packages
OpenFarm
open database for farming and gardening knowledge
OpenFoodNetwork
software to manage the lifecycle of food
OpenProject
project management system
openSNP
annotate your SNP-set
Open-Source Event Manager
event management tool tailored to conferences
OpenSourceRails.org
the codebase to this site
Open Split Time
endurance event data management
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
Pay
payments engine
Peatio
crypto currency exchange software
Pig CI
Rails performance monitoring, plus CI
planningalerts.org.au
planning alerts for Australians
PublicLab.org
collaborative knowledge-exchange platform
Punchclock
simple electronic punch clock
Pupilfirst
everything you need for an online school
Racing On Rails
bike racing association management
Registry
TLD management software
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
ShinyCMS
plugin-based CMS
sumofus.org
source code to sumofus.org
TagTeam
social tagging for academics
TalentProtocol.com
be your own NFT
TaxonWorks
workbench for biodiversity informatics
TheOdinProject.com
free web development courses
tip4commit.com
reward contributors
Upcase.com
learning platform for programming
va.gov
API for va.gov
vglist.co
video game library tracking
visualizer.coffee
visualize hipster coffee machines
weg.li
report bad german parkers
whitehall
government content publishing for gov.uk
WikiEduDashboard
course dashboard system
zammad
enterprise-ready helpdesk and customer support system