Assassin's Creed I and II are among them as well as Tom Clancy's H.A.W.X. and Ghost Recon: Advanced Warfighter. The sale ends tomorrow.
For $39.99 you get yourself both Assassin's Creed titles, and yes the second game does include Ubi's PC DRM so you've been warned. $14.99 for a bundle of Ghost Recon: Advanced Warfighter games. You could also pick their E3 Ubisoft Pack...
That includes 6 games: Tom Clancy's H.A.W.X, both Ghost Recon titles, Driver: Parallel Lines, Assassin's Creed and Shawn White Skateboarding - all for $49.99. This, June 25th. Do you browse the digital stores of publishers?