Confirmation for destructive Rails task.
MIT License
Application generator for Rails3
Upload Rails assets to S3
A tool like perl's "perltidy" for reformatting Ruby source.
Some utilities for your Minitest day-to-day usage.
Collection of useful modules for Rails.
RSpec support for testing Rake tasks
Rails migration tasks for Capistrano v3 (db:rollback, dbup/down, dbstatus, db:seed, etc. via Capi...
Wrap your methods in DB Transactions
Bundler::GemHelper for Gemfury
Rails Generators for Cucumber with special support for Capybara and DatabaseCleaner
Use Hashids (http://hashids.org/ruby/) in your Rails app ActiveRecord models.
Ruby haltable gem
TDD your shell scripts using RSpec