Browser Extensions I Actually Use - The Media Temple Blog
Animate.css
GenerateWP
List of WordPress ressources and tools
The ultimate CSS tools for web designers | CSSmatic
Gradient generator, border radius, noise and box shadow
geuis/helium-css · GitHub
Helium is a tool for discovering unused CSS across many pages on a web site
kswedberg/jquery-smooth-scroll · GitHub
Cross browser smoothscrolling
Ultimate CSS Gradient Generator - ColorZilla.com
Useful to generate IE 6-98 and 9 gradients (filter or svg)
Modern Web Development
WebPagetest - Website Performance and Optimization Test
Ultimate List of HTML5 and CSS3 Tools | Admix Web
great tools that can help you to master these new features of both HTML5 and CSS3
ProtoFluid - HTML5 and CSS3 Web App Prototyping
Test your @media queries and web app on various screen sizes
Closure Tools - Google Code
Open source JavaScript compiler, debugger, library, and templating system from Google
WriteMaps Site Map Application.
Create, edit, and share your sitemaps online