Sony has announced the free PS3, PSP and Vita games that are coming for free as part of PlayStation Plus this September. The games in question are Resident Evil Chronicles HD Collection for the PS3 (the bundle features Resident Evil: The Umbrella Chronicles and The Darkside Chronicles,) Ico for the PS3, Grand Theft Auto: Liberty City Stories for the PSP and Vita, Rayman Origins for the Vita and Galaga Legions DX for the PS3.
Overall, the list of freebies seems quite complete, since it includes games for various PlayStation platforms. It’s worth mentioning that the order in which these games are coming out hasn’t been specified, so you should visit this site and read my PlayStation Store Update posts every week.
Source: PlayStation Blog