Electowidget

Electowidget is a PHP library (initially a plugin for MediaWiki) designed to make it possible to conduct Internet polls and elections using many different voting systems, including the Schulze (Condorcet) method, instant runoff voting, approval voting, and even plain old plurality. It also assists in explaining different election methods by providing an easy way of tallying example elections and comparing the results as computed by different elections. The modular design allows for plugging in new election tallying methods, different ballot designs, and different ballot formats.