--- a/css.rst	Mon Dec 23 23:03:20 2013 +0200
+++ b/css.rst	Mon Dec 23 23:14:49 2013 +0200
@@ -102,3 +102,30 @@
   * http://en.wikipedia.org/wiki/Comparison_of_layout_engines_%28CSS%29
   * http://www.css3.info/modules/selector-compat/
 
+CSS compilers.
+==============
+
+  http://lesscss.org/
+                LESS extends CSS with dynamic behavior such as variables,
+                mixins, operations and functions.
+  http://sass-lang.com/
+                Sass is the most mature, stable, and powerful professional grade
+                CSS extension language in the world.
+
+CSS frameworks.
+===============
+
+  http://getbootstrap.com/
+                Sleek, intuitive, and powerful mobile first front-end framework
+                for faster and easier web development.
+  http://bootswatch.com/
+                Free themes for Bootstrap.
+  http://960.gs/
+                Grid framework.
+  http://purecss.io/
+                A set of small, responsive CSS modules that you can use in every
+                web project.
+  http://foundation.zurb.com/
+                The most advanced responsive front-end framework in the world.
+
+