For Ubisoft's 30th anniversary, they've been giving away free copies of some of their games since June and will continue until the end of the year
It's too late to claim June's game Prince of Persia, but there's still a few days left to claim July's game Splinter Cell, and on the 17th you'll be able to get Rayman Origins for August
https://club.ubi.com/#!/en-US/ubi30And because this post pops up every single time there's a free game on any platform other than Steam, let me save you the trouble: "Uplay? No thanks."