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
Amahi
your personal cloud and media server
Annict.com
anime website
Calls For Proposal App
manage a conference CFP
Chaskiq
full-featured live chat, support, and marketing platform
Clain for Crown Court Defense
advocacy for defense payments
Coderwall
Professional network for software engineers
Coinfi
crypto market intelligence platform
Coursemology
open-source gameified learning platform
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
Discourse
next-generation discussion platform
Drug Gene Interaction Database
The Genome Institute's drug gene interaction database
Ekylibre
farm management information system
Email Dashboard
email suite for marketing and CRM
Expertiza
peer-reviews app, supported by the National Science Foundation
Fairmondo
free market place in the hand of the users
Fat Free CRM
a clean, customizable CRM
FederalRegister.gov
daily journal for the United States Government
FeedBunch
simple and elegant reader
forem
the platform that powers dev.to
fromthepage.com
crowdsource handwritten documents
getsiteinspector.com
a tool for developers to check their pages
GitLab
self hosted Git management
Helpy
A Modern Helpdesk Alternative
Hitobito
full-scale group hierarchy management
Hound
Your code, always in style.
HRMS
HR management
huginn
open-source IFTTT
Human Essentials
management system for essentials banks
iNaturalist.org
social network for nature stuff
Juvia
commenting server of the likes of Discus or IntenseDebate
libraries.io
open-source discovery service
lobsters
link-aggregation site, inspired by Hacker News
Loomio
make decisions together
Mastodon
distributed, interconnected microblogging
Morph.io
web scraping tool
nindika.com
nintendo switch e-shop
Octobox
GitHub notification manager
OneBody
church management software
Open Build Service
build service for Linux packages
OpenProject
project management system
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
planningalerts.org.au
planning alerts for Australians
Plylst
Spotify playlist tool
Punchclock
simple electronic punch clock
Racing On Rails
bike racing association management
Registry
TLD management software
Skyderby
flight analysis and competition scoring
TagTeam
social tagging for academics
Teambox
the original teambox.com
Upcase.com
learning platform for programming
va.gov
API for va.gov
whitehall
government content publishing for gov.uk
WikiEduDashboard
course dashboard system
World Cube Association
everything for the World Cube Association