CSS plays a major roll to create websites and if your looking for online tool to optimize your CSS file here we share 5 cool websites to optimize your CSS file.

Yahoo Developer Network provides YUI CSS cheat sheets on Reset, Base, Fonts, Grids.

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in (HTML) a markup language.

CSS one of the most important for a website used to predefine the design of a website in a CSS file.

If you are looking to learn HTML and CSS with online references and example, here is a site htmlplayground which gives you option to learn HTML and CSS easily.

The Woork Handbook is a free eBook about CSS, HTML, Ajax, web programming etc..

If you like to design your web page or any portals without CSS (Cascading Style Sheets) you cannot design it. If you like to design different styles of buttons to attract users then you can use pagetutor’s online CSS button designer.