css.gg : Minimalistic icon library Designed by code, Customizable & Retina-Ready icons — built 100% in pure CSS. Easy integration: Embed, NPM & API
Font Awesome : Font Awesome, the iconic font designed for use with Twitter Bootstrap. In a single collection, Font Awesome is a pictographic language of web-related ...
Email-Blueprints : Email Blueprints is a collection of HTML email templates that can serve as a solid foundation and starting point for the design of emails.
csscss : csscss will parse any CSS files you give it and let you know which rulesets have duplicated declarations.
Diagnostic.css : Diagnostic.css is a stylesheet which allows the user to test for common errors in a page's markup.
Also : https://github.com/karlgroves/diagnostic.css
