All apps that can filter calls and SMS are not available on the App store. Only available for Jailbroken iPhones.
Call and SMS filtering:
- Pysl: It is free but did not work well for me. The UI is clunks
- Mcleaner: This worked. UI is not very intuitive but ok. Has a 15 day free trial
- iBlacklist: Havent tried it. Trial version can block limited number of numbers (2!!)
- SMS2Mail: Free app to email SMS messages (Cydia Categories->Messaging)
Chess and other games:
- Black and White: Reversi for iPhone. App store (FREE)
- Chess Puzzles: Free iTunes store app with 50 puzzles
- Chess game and Chess puzzles from Shredder (FREE). Excellent puzzles refreshed every day.
- Tetsuki: Allows you to connect and play on GO servers (GO, Baduk, WeiQi)