1. Stack rescueA gem for Rails to automatically search Google for exceptions raised in your Rails applications
3. NoticedNotifications for Ruby on Rails applications
4. Python AptThis is a Python library interface to libapt, which allows you to query and manipulat APT package repository information using the Python programming language.
6. JumpstartEasily jumpstart a new Rails application with a bunch of great features by default
9. MadminA robust Admin Interface for Ruby on Rails apps
10. ReceiptsEasy receipts and invoices for your Rails applications
11. oauthableSetup, test, and implement the OAuth connections to over 70 different APIs.