Create cool CSS background patterns for your web design work with this collection of pure CSS patterns
MagicPattern - The best design toolbox with 10+ tools for anyone
Patterninja - Create patterns online
Hero Patterns - A collection of repeatable SVG background patterns
PatternPad - Create beautiful geometric patterns
Cool Backgrounds - Create fast, one-of-a-kind hero images for blogs & websites
Pattern.css - CSS library to fill empty background with beautiful patterns