Koala is a GUI application for Less, Sass, Compass and CoffeeScript compilation, to help web developers to use them more efficiently. Koala can run in windows, linux and mac.

Simple tooltips made of pure CSS and made by Claudio Holanda. Balloon.css lets you add tooltips to elements without JavaScript and in just a few lines of CSS.

Accessible drag and drop list reorder solution by Harris Schneiderman. His list reorder module Dragon Drop is keyboard and assistive technology accessible thanks to live regions.