Free Software
Free Software, for the purposes of the CLiki site, is software that complies with the Debian Free Software Guidelines.

`Open Source' is another name for approximately the same software (minus some really rather picky distinctions) but has a rather different set of political baggage.

A note from your sponsor: the debate about which of these terms is `better' or `correct' has been done to death many times before. If you want to re-enact it, please don't use CLiki for that purpose.