Mastodon
distributed, interconnected microblogging
huginn
open-source IFTTT
Discourse
next-generation discussion platform
GitLab
self hosted Git management
forem
the platform that powers dev.to
Diaspora
community-run, distributed social-network
OpenProject
project management system
Canvas LMS
enterprise-grade learning management system
Octobox
GitHub notification manager
Fat Free CRM
a clean, customizable CRM
lobsters
link-aggregation site, inspired by Hacker News
Helpy
A Modern Helpdesk Alternative
Chaskiq
full-featured live chat, support, and marketing platform
Loomio
make decisions together
Hound
Your code, always in style.
Teambox
the original teambox.com
Danbooru
taggable image board
OneBody
church management software
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
Juvia
commenting server of the likes of Discus or IntenseDebate
libraries.io
open-source discovery service
Organization for Transformative Works Archive
archives of fanworks, including fanfic, fanart, and fan vids
whitehall
government content publishing for gov.uk
Open Build Service
build service for Linux packages
Open Source Billing
Beautifully Simple Billing Software
ActiveWorkflow.org
turn complex requirements to workflows
Annict.com
anime website
adopt-a-hydrant
adopt-a-hydrant software
iNaturalist.org
social network for nature stuff
Morph.io
web scraping tool
Concerto
digital signage system
Alaveteli
easy FOIA requests for any jurisdiction
Plylst
Spotify playlist tool
WikiEduDashboard
course dashboard system
Human Essentials
management system for essentials banks
alonetone
home for musicians, their tracks and albums
Ekylibre
farm management information system
Hitobito
full-scale group hierarchy management
Upcase.com
learning platform for programming
World Cube Association
everything for the World Cube Association
Calls For Proposal App
manage a conference CFP
getsiteinspector.com
a tool for developers to check their pages
Coderwall
Professional network for software engineers
Expertiza
peer-reviews app, supported by the National Science Foundation
fromthepage.com
crowdsource handwritten documents
Amahi
your personal cloud and media server
va.gov
API for va.gov
AgileVentures
source code to agileventures.org
Email Dashboard
email suite for marketing and CRM
Coursemology
open-source gameified learning platform
FederalRegister.gov
daily journal for the United States Government
Fairmondo
free market place in the hand of the users
CrimeThinc.com
the app that powers this website
Drug Gene Interaction Database
The Genome Institute's drug gene interaction database
FeedBunch
simple and elegant reader
TagTeam
social tagging for academics
DCAF Case Management
case management system
planningalerts.org.au
planning alerts for Australians
Skyderby
flight analysis and competition scoring
Coinfi
crypto market intelligence platform
Racing On Rails
bike racing association management
FleetYards
A Ship Database and Web API based on the official Star Citizen Ship Matrix
Registry
TLD management software
Punchclock
simple electronic punch clock
HRMS
HR management
nindika.com
nintendo switch e-shop
Clain for Crown Court Defense
advocacy for defense payments