Tim Fletcher has created an easy-to-use online Google app called Instant STV. With his app you specify a ballot file, select one of three methods (ERS97, Meek, and Warren), and request output in text or HTML. His app allows you to try OpenSTV before installing it on your computer.

The desktop version of OpenSTV has additional features that are not supported in Tim's app, such as numerous additional counting methods and the ability to create and edit ballot files.