Js2coffee: convert JavaScript code to CoffeeScript
Knight.io - Github's finest repos; since 2012
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Mike Subelsky's Blog: Lean startup tools for Rails apps
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Tools of the Trade 2009 | Travis Dunn
tools of the trade
Create UML diagrams online in seconds, no special tools needed.
CodeRack
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Aeonscope | MacOS Ruby Development Setup
ruby code
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Must have gems for development machine in ruby on rails - CodeBeerStartups
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CapHub - multiple applications deployment with Capistrano | Railsware blog