jeff.oneill's blog

OpenSTV 1.5 Released

Announcing OpenSTV version 1.5 -- Software for computing the single
transferable vote, instant runoff voting, Condorcet, approval, and many
other voting systems. More details and download links are at

The most significant changes in this release are the following:

-- Improved format of election results
-- No limit on the number of candidates (previously was limited to 255
-- Election methods are now done as plugins so users can add their own
methods (although only for advanced users at this point).
-- Cambridge STV can save the winner's ballots in files for determining
replacements after a vacancy
-- Added statutes of some rules to the documentation
-- Added draft of New Zealand Meek (work in progress)
-- Added new method called QPQ

Try OpenSTV Online

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.

Cornell Chronicle Article Cites Benefits of OpenSTV

Cornell University (my alma mater times two) recently used OpenSTV to count the votes for its election of the student member of its Board of Trustees. Cornell previously used an outside vendor to collect and count the votes. Now, Cornell uses its own system to collect the votes and uses OpenSTV to do the counting.

The Cornell Chronicle posted an article about the election and touting the benefits of OpenSTV:

Organizations using OpenSTV

Here is a sampling of organizations that have used OpenSTV to conduct an election as found in a Google search. Organizations of students and computer programmers (and in one case, both) make up nearly the entire list.

  • Leeds Metropolitan Student Union
  • Zope Foundation
  • Community Council election
  • Apache Foundation
  • University College London Union
  • OASIS (Organization for the Advancement of Structured Information Standards)
  • VoterMedia.Org at University of British Columbia
  • Associated Students of the University of California, Davis
  • League of Professional System Administrators
  • The Computer Science Departmental Society for York University (HackSoc)
  • OpenSolaris Board

New Website Address —

This website has been moved from and is now hosted at its own address: This will improve the performance of the site and provide us with more options for expanding content in the future.

Links to the old website should be automatically redirected to the new address, but please update your links/bookmarks to the new address because the automatic redirect is temporary.

Please let me know if you see anything with the new site that needs fixing.

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