AirCasting
platform for gathering, visualization and sharing of environmental data
Alchemy CMS
popular content management engine
Bike Index
the internet's bike registry
C2
approval process automation
Calls For Proposal App
manage a conference CFP
Canvas LMS
enterprise-grade learning management system
Central
Fulcrum project planning tool fork
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
Coyote
image annotation
Datoji
easy JSON mocking for developers
datorss.com
RSS search
Decidim
a framework for democracy
Diaspora
community-run, distributed social-network
Discourse
next-generation discussion platform
Dog API
an API for doggo info
Droptune
music notifications for Spotify and Apple Music
E621.net
an art image board
Ekylibre
farm management information system
exercism.io
code practice and mentorship
FederalRegister.gov
daily journal for the United States Government
FoodSoft
manage food coop
forem
the platform that powers dev.to
getsiteinspector.com
a tool for developers to check their pages
GitLab
self hosted Git management
Helpful
simple and elegant support system
Hitobito
full-scale group hierarchy management
Hound
Your code, always in style.
kitsu
kitsu.io API server
libraries.io
open-source discovery service
LocalOrbit
local food management stuff
Loomio
make decisions together
LumenDatabase
database of legal complaints and requests for removals
Mastodon
distributed, interconnected microblogging
OpenFarm
open database for farming and gardening knowledge
OpenFoodNetwork
software to manage the lifecycle of food
Open-Source Event Manager
event management tool tailored to conferences
Open Split Time
endurance event data management
Outpost
service directories platform
Panoptes
API to support user-defined research projects
Peatio
crypto currency exchange software
Punchclock
simple electronic punch clock
SmartVPN Billing
billing management for hosting
Snippet Manager
manage your snippets
Spina
A beautiful CMS for Rails developers
Spree
a flexible e-commerce platform
Texterify.com
translation and localization management
TheOdinProject.com
free web development courses
Upcase.com
learning platform for programming
va.gov
API for va.gov
Violet
automation, CMS, blog, forum and email thing.