GOG.com's got most of their Double Fine catalogue on sale, including AAA games like Psychonauts and Brutal Legend, smaller fare like Massive Chalice (I had to make that joke), and LucasArts reissues like Grim Fandango: Remastered and Day of the Tentacle: Remastered. The exception is funky sci-fi platformer Headlander, which is coincidentally the only one of the lot I don't own. Maybe next time, Headlander.
As is par for the course with GOG, getting the games gets you all sorts of extra goodies.
Other games are on sale, too, including Samorost.
Thanks to Javier Tolstoi for bringing this to our attention.
Source: GOG