ActiveWorkflow.org
turn complex requirements to workflows
AppPerf
application and performance monitoring tool
Ciao
uptime monitoring
Coderwall
Professional network for software engineers
CodeTriage
directory of open-source projects with open issues
Cuttlefish
a good-enough SMTP server so you can ditch SMTP providers
Datoji
easy JSON mocking for developers
Duckrails
tool to mock API endpoints
Ecosystem Dashboard
open-source ecosystem monitoring
exercism.io
code practice and mentorship
foreman
server lifecycle automation
getsiteinspector.com
a tool for developers to check their pages
GitLab
self hosted Git management
Hound
Your code, always in style.
Hours
Time registration that doesn't suck.
Intercity
web-based Dokku deployment
libraries.io
open-source discovery service
Motor Admin
if ActiveAdmin and Blazer had a baby
Notebook Gallery
enterprise Jupyter notebook sharing and collaboration platform
Octobox
GitHub notification manager
Open Build Service
build service for Linux packages
OpenProject
project management system
OpenSourceRails.org
the codebase to this site
Pay
payments engine
Pig CI
Rails performance monitoring, plus CI
Postal
mail delivery platform for incoming and outgoing e-mail
Redmine
web based project management
Registry
TLD management software
rubygems.org
The Ruby community's gem hosting service
rubytoolbox.com
catalog of all Rubygems that keeps track of popularity and health metrics
samson
Web interface for deployments
Snippet Manager
manage your snippets
Squash
exception reporting and bug analysis by Square
Staytus
status pages
Texterify.com
translation and localization management
TheOdinProject.com
free web development courses
tip4commit.com
reward contributors
Upcase.com
learning platform for programming
Vinifera
tool to monitor leaked secrets