- arel_converter 6 A gem to that parses your ActiveRecord files and converts them to Rails 4 and Ruby 2.0 syntax
- gem_import_export 4 Nice at the time, Bundler is much better for this nowadays
- rails_upgrade 3 Plugin to run checks on your Rails 2.x/3.x to check for obvious upgrade points on the path to 3.0
- whenever 2 Provides clean ruby syntax for defining messy cron jobs and running them Whenever.
- mca 1 Draw system for the CurlManitoba