Free trial version of the full version 12. If you try this and like it, you already have the full version, you just need to pay for a registration key to unlock all its features.
Free.
Runs on Windows.
Described (by its creator) at http://www.smart-games.com/manyfaces.html.
Can be downloaded from http://www.smart-games.com/mfgo12-download.html.
Available from Smart Games.