AirCasting
platform for gathering, visualization and sharing of environmental data
AppPerf
application and performance monitoring tool
Bike Index
the internet's bike registry
CircuitVerse.org
circuit simulator
CodeTriage
directory of open-source projects with open issues
Discourse
next-generation discussion platform
Ecosystem Dashboard
open-source ecosystem monitoring
exercism.io
code practice and mentorship
forem
the platform that powers dev.to
getsiteinspector.com
a tool for developers to check their pages
GitLab
self hosted Git management
Growstuff
tool for small-scale food growers
libraries.io
open-source discovery service
Loomio
make decisions together
Mastodon
distributed, interconnected microblogging
Motor Admin
if ActiveAdmin and Blazer had a baby
Octobox
GitHub notification manager
OpenProject
project management system
planningalerts.org.au
planning alerts for Australians
Racing On Rails
bike racing association management
rubytoolbox.com
catalog of all Rubygems that keeps track of popularity and health metrics
sharetribe
Marketplace platform
Splits.io
speedrunning data and analysis
va.gov
API for va.gov
WikiEduDashboard
course dashboard system