The Open Voting Consortium (OVC) software is accessed as Source Forge project evm2003, with 26 listed developers. Anyone may access the source and documentation, although it does take experience to understand how to analyze it. However only the registered developers for this project may change the source.
Some of the more successful open source projects include:
The "California Performance Review" issued by the Governor's staff states:
"The state should more extensively consider use of open source software, which can in many cases provide the same functionality as closed source software at a much lower total cost of ownership."and
"Incorporate open source software as a viable alternative to any software procurement."
Open source is not just about cost. Once you switch to open source, you are no longer tied to a particular hardware vendor, and can find many more programmers to fix problems in the application.