This is a simple tool to help you develop Ruby on Rails applications on Mac OS X. While those not choosing to set up their Rails development environment using Locomotive may spend hours frustrated by broken libraries, compilation errors, and incomprehensible incompatibilities, you will be able to jump right into Rails development the minute you finish downloading. Regardless of whether you are a beginner or an expert, Locomotive will save you time, reduce your stress, and eliminate (your rails installation related) exasperation.

Homepage: http://locomotive.raaum.org/
Download: Locomotive_2.0.8_Mar2007.dmg