Black Candy
self-hosted music streaming server
Canvas LMS
enterprise-grade learning management system
Chatwoot
customer engagement platform
CircuitVerse.org
circuit simulator
Danbooru
taggable image board
Feedbin
open-source feed reader for multiple platforms
forem
the platform that powers dev.to
Gem.sh
Beautiful documentation for any RubyGem
iNaturalist.org
social network for nature stuff
Locomotive CMS
a multisite CMS with liquid templating
nindika.com
nintendo switch e-shop
OpenFoodNetwork
software to manage the lifecycle of food
OpenProject
project management system
pinballmap.com
source code to pinballmap.com
Pupilfirst
everything you need for an online school
TheOdinProject.com
free web development courses
visualizer.coffee
visualize hipster coffee machines