Sentry is cross-platform crash reporting built with love

JavaScript parser / mangler / compressor / beautifier library for NodeJS

JSHint is a tool that helps to detect errors and potential problems in your JavaScript code

Better error page for Rack apps

Jenkins Continuous Integration Server

Free continuous integration platform for GitHub projects.

Take a peek into your Rails applications.

RSpec Best Practices

The open source diagnostics platform for the web

Check your project for common sources of contributor friction.

Pretty RFC indexes and reformats RFC documents for easier discovery and viewing.

Continuous build tool for Python.

Make Xcode bump build #, tag git, and archive files on Product->Archive