Saw this post on TrueAchievements.
Can't find an end date but these games are currently free to play on Xbox One if you have a Xbox Live Gold Subscription.
Borderlands: The Handsome Collection
Shoot and loot as you explore the mayhem-filled world of Pandora in BORDERLANDS 2 and the lunar madness of BORDERLANDS: THE PRE-SEQUEL in BORDERLANDS: THE HANDSOME COLLECTION. Experience the award-winning FPS-RPG series, including its bazillions of guns, trademark cooperative gameplay, and all bonus add-on content, with high performance like never before on a new generation of consoles.
WWE 2K19 arrives as the latest entry to the flagship WWE video game franchise, showcasing a massive roster of popular WWE Superstars, Legends and Hall of Famers. Experience authentic WWE gameplay, extensive creation options, and more!
Death Is Not an Escape. Dead by Daylight is a multiplayer (4vs1) horror game where one player takes on the role of the savage Killer, and the other four players play as Survivors, trying to escape the Killer and avoid being caught, tortured and killed.
Also f2p is The Elder Scrolls Online: Tamriel Unlimited.