CSS References helpful if you are a web developer, you might not remember all properties and values. This post leads you to the best CSS reference Websites, cheat sheets, pdf, Books and more.
The advanced CSS3 have many properties and values it is almost impossible to remember all. CSS references are handy when you learn CSS, it is just like a backup for your memory. CSS reference websites are also great for learning latest things in CSS as it comes.
There are Plenty of websites providing CSS related resources, but we found few of them are excellent. These sources we have listed here have great documentation, great examples and updations. If you are new to CSS this is an encyclopedia for you.
See also : 100+ Best CSS Frameworks for Responsive Design
CSS Triggers

CSS Reference | A free visual guide to CSS

CSS reference | MDN

SitePoint CSS Reference

CSS Properties | HTML Dog

CSS Almanac | CSS-Tricks

CSS Reference | Codrops

CSS Reference | W3Schools

CSS HTML XHTML Reference Book

CSS Basic User Interface Module Level 3 (CSS3 UI)

CSS Properties Index | Jens Oliver Meiert

Complete CSS Reference | JavaScript Kit

Quick CSS Property Reference | Little Web Hut

CSS References | The Web Design Group

All CSS Properties Listed Alphabetically

CSS Properties List | PageResource

CSS Property Reference | Tizag Tutorials

CSS 2.1 Reference | Cultured Code

CSS Reference | Webucator

Introduction to Safari CSS Reference

Microsoft CSS Reference

Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

CSS Reference | SS64.com

CSS Cheat Sheet

W3schools CSS Reference

HTML and CSS Reference Guide

CSS Handbook
