sfxr – Simple and fun game sound effects generator

sfxr (short for Sound Effects Rater) is a free and tiny sound effect quick generating tool specially designed for game developers, developed by Tomas Pettersson (DrPetter) from Sweden in the 10th Ludum Dare competition in 2007. As a procedural video game sound automatic generator for Windows, it's so popular that it has many code transplantation works on Mac, Linux, Web, ActionScript and iPhone, made by other developers.