AppLock lets you protect any applications you want with a passcode: SMS, Email, Pictures, Calendar... stop others from invading your privacy! This is similar to App Protector except that it's free (ad supported). A pro unlock key that remove ads and unlocks more features will be available on the market soon.
App Lock was developed for Android by Creative Core
Package name : com.cc.applock.apk
Download AppLock Android V 1.0:
http://www.megaupload.com/?d=9LI7P6RL