Open-source voting system

An open-source voting system (OSVS), also known as open-source voting (or OSV), is a voting system that uses open-source software (and/or hardware) that is completely transparent in its design in order to be checked by anyone for bugs or issues. Free and open-source systems can be adapted and used by others without paying licensing fees, improving the odds they achieve the scale usually needed for long-term success.

Source: Wikipedia — Open-source voting system (CC BY-SA 4.0)