Here is a page of all GOG.com free games currently available.
GOG.com has been giving away permanently free games for over a decade. The number of permafreebies have also been steadily increasing. It is good to see GOG put them all on a single handy page.
The only ones I have played from that list are Beneath a Steel Sky, Ultima IV: Quest of the Avatar, Tyrian 2000 and Stargunner.
