Stack Exchange is using OpaVote and OpenSTV for its community moderator elections for 2015.
Supporting Continuing Development of OpenSTV
OpenSTV was first released in October 2003, and over the past seven years has been downloaded more than 10,000 times, used by numerous large universities and other organizations, and used to verify the official STV counting software for Scotland and Iceland.
I never imagined in 2003 that OpenSTV would become so successful or that I would still be working on it seven years later. Developing the software and maintaining this website has been done almost entirely by myself (though I greatly appreciate the valuable assistance I have received from others).
The software continues to grow in its abilities and complexity, and thus becomes more difficult to maintain and improve. To support my out-of-pocket expenses (e.g., web hosting) and motivate continued development, I am asking $5 for each download. OpenSTV continues to be open-source software, and I appreciate your support.