This appears to be the code repo- https://github.com/votingworks/vxsuite-complete-system

But it does not have a license file or any license headers... meaning it may not be under an Open Source license at all?

Some of their code- the audit program, looks like it is AGPLv3... which seems like an odd choice of license for this sort of system. Still happy to see more work on Open Source voting systems.