PurgeCSS : PurgeCSS is a tool to remove unused CSS. It can be part of your development workflow.
Compass : Compass is an open-source CSS Authoring Framework.
librosa : librosa is a python package for music and audio analysis. It provides the building blocks necessary to create music information retrieval systems.
Sprite Cow : Sprite Cow helps you get the background-position, width and height of sprites within a spritesheet as a nice bit of copyable css.
Galen Framework : Automated testing of look and feel for your responsive websites.
Layout testing seemed always a complex task. Galen Framework offers a simple solution...
csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.
