Ajax Star Rating Script adds a rating system (with stars) to rate images, articles, games, or any element in pages of your website. The rating data can be saved in text files on the server, or in a MySQL database.
Open Hot or Not is a free implementation of popular rating sites like HotorNot, sexyono, etc. It has support for themes and language translation.
A tool for preparing HTML slides with LaTeX formulae.
A mod player library.