Enable Viacam (eViacam) is a mouse replacement software that moves the pointer as you move your head. It works on standard PCs equipped with a Web camera. No additional hardware is required. It is based on the award winning Facial Mouse software.
A GNU/Linux rescue CD that comes with Rescapp, a nice wizard that will guide you through your rescue tasks.
A PHP graphics library for fast image manipulation and drawing using the Gd Library.