The San Francisco Elections Commission has resolved to “support the development and certification of an open source voting system running on commercial off-the-shelf hardware; and to request that the Mayor and Board of Supervisors initiate and fund a project to develop and certify such a system for use in San Francisco”.
<http://www.theregister.co.uk/2016/02/10/san_francisco_to_open_source_voting_systems/>
Contrast this with ongoing unsuccessful attempts to get access to the software used for Australian federal elections under its Freedom Of Information Act <http://www.theregister.co.uk/2015/12/13/aec_easycount_foi_decision/>:
[Hobart lawyer Michael] Cordover sought the source code because Australia's 2013 election produced some irregularities.
What software do we use in NZ?
From a September 2015 news article, it seems Wellington might use Electionz.com: http://www.stuff.co.nz/dominion-post/news/72115229
Cheers, Peter -- Peter Reutemann Dept. of Computer Science University of Waikato, NZ +64 (7) 858-5174 http://www.cms.waikato.ac.nz/~fracpete/ http://www.data-mining.co.nz/