This is a tiny application that block spam messages. Support wildcard pattern and regular expression matching. Although it have such powerful features, the package is only about 50K large, and it requires minimal system permission (Only Receive messages !)
And, it's full FREE! and NO-ADS!
If you think this app is helpful, rate me 5-stars!
Project homepage: http://code.google.com/p/sms-blacklist

Screenshots: