Abalone
data tracking and analytics for conservation efforts
adopt-a-hydrant
adopt-a-hydrant software
AgileVentures
source code to agileventures.org
Airesis
eDemocracy
Alaveteli
easy FOIA requests for any jurisdiction
Amahi
your personal cloud and media server
Annict.com
anime website
AppPerf
application and performance monitoring tool
Bike Index
the internet's bike registry
Binda CMS
headless CMS
Black Candy
self-hosted music streaming server
Bluedoc
document management tool
Caffeinate
a framework for easily creating and scheduling email campaigns
Case File Editor
editor for digital case files
Central
Fulcrum project planning tool fork
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
Concerto
digital signage system
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
Danbooru
taggable image board
Datoji
easy JSON mocking for developers
datorss.com
RSS search
DCAF Case Management
case management system
Diaspora
community-run, distributed social-network
Discourse
next-generation discussion platform
dokno
Rails Engine for storing and managing an app's domain knowledge
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
Expertiza
peer-reviews app, supported by the National Science Foundation
Fairmondo
free market place in the hand of the users
FleetYards
A Ship Database and Web API based on the official Star Citizen Ship Matrix
forem
the platform that powers dev.to
Gamocosm.com
Minecraft server hosting
getsiteinspector.com
a tool for developers to check their pages
Ghostlight Folio
theatrical production management
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
Helpy
A Modern Helpdesk Alternative
Hours
Time registration that doesn't suck.
huginn
open-source IFTTT
Human Essentials
management system for essentials banks
icare
carpooling platform
if-me.org
mental health communication
iNaturalist.org
social network for nature stuff
Lewsnetter
email marketing application
libraries.io
open-source discovery service
lobsters
link-aggregation site, inspired by Hacker News
Locomotive CMS
a multisite CMS with liquid templating
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
Open Build Service
build service for Linux packages
OpenFarm
open database for farming and gardening knowledge
OpenFoodNetwork
software to manage the lifecycle of food
openSNP
annotate your SNP-set
openstreetmap.org
crowd-sourced map of the world
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
Outpost
service directories platform
Pig CI
Rails performance monitoring, plus CI
pinballmap.com
source code to pinballmap.com
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
RebelsManager
a platform for social good
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
Sanataro
household accounting software
ShinyCMS
plugin-based CMS
Skyderby
flight analysis and competition scoring
SmartVPN Billing
billing management for hosting
Snippet Manager
manage your snippets
Spina
A beautiful CMS for Rails developers
Splits.io
speedrunning data and analysis
sumofus.org
source code to sumofus.org
TagTeam
social tagging for academics
TalentProtocol.com
be your own NFT
TaxonWorks
workbench for biodiversity informatics
Terrastories
geostorytelling
Texterify.com
translation and localization management
TheOdinProject.com
free web development courses
TimeOverflow
time banking system
tip4commit.com
reward contributors
Tracks
software for implementing David Allen's Getting Things Done™ methodology
uk-postcodes
postcodes application
Upcase.com
learning platform for programming
va.gov
API for va.gov
vglist.co
video game library tracking
whitehall
government content publishing for gov.uk
WikiEduDashboard
course dashboard system
World Cube Association
everything for the World Cube Association