CSS Lint : CSS Lint points out problems with your CSS code. It does basic syntax checking as well as applying a set of rules to the code that look for problemati...
Photon : UI toolkit for building desktop apps with Electron.
InK - Interface Kit : Ink is a set of tools for quick development of web interfaces.
Normalize.css : A modern, HTML5-ready alternative to CSS resets
Normalize.css makes browsers render all elements more consistently and in line with modern standards. ...
