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  - [Colourful CSS Gradient Background Generator](http://www.webcore-it.com/colorful-background/) - Gnerates colourful backgrounds with a CSS gradient (or 4)
 
 ## Preprocessors and rewriters
- - [CSS Shorthand Generator](http://shrthnd.volume7.io/)
+ - [CSS Shorthand Generator](http://shrthnd.volume7.io/) - A wensite that converts your long hand styling rules into their shorthand versions
+ - [Myth](http://myth.io/) - A preprocessor that converts CSS using all the laatest techniques into CSS that every browser will understand with graceful fallbacks
 
 ## Tutorials and References
  - [A Complete Guide to Flexbox](https://css-tricks.com/snippets/css/a-guide-to-flexbox/) - A good css-tricks tutorial on how the flexbox works