I started a wikia page (steam.wikia.com/wiki/List_of_DRM-free_games) for this list, since the author is inactive here. The list could stay current an alive there, that's what I hope.
Yeah, the text there is somewhat copied from here, I hope the author has nothing against that :)
I don't have that much time to complete the list on my own so if anybody wants to add something - that would be great. The list on wikia should also be more precise, so I added extra columns for different OSs, since there are sometimes discrepances.
Appreciate you taking the time to do that.