Bourbon is described as '- A simple and lightweight mixin library for Sass / CSS' and is an app in the Development category. There are seven alternatives to Bourbon for a variety of platforms, including Self-Hosted solutions, Mac, Windows, Linux and Online / Web-based. The best alternative is Foundation, which is both free and Open Source. Other great apps like Bourbon are Fire.app (Free, Open Source), Live.js (Free, Open Source), kouto swiss (Free, Open Source) and Basis (Free, Open Source).
Fire.app is a menu bar only app for dead easy HTML prototyping. It supports Sass/Compass, Haml, ERB, Markdown, CoffeeScript, and more. Fire.app is written in Java (JRuby), and works in Mac, Linux and PC.