Sony has announced the PlayStation Plus line up for September.
Hopefully, you picked up the August offerings in time.
Prince of Persia: The Forgotten Sands and Datura are the PS3 games for the month, and Badland will be available for PS Vita, PS4 and PS3.
Vita users can pick up Amnesia: Memories.
There isn't really any additional information on the PS Blogs, but links to each are included above anyway.