iAppLocker – Free Tweak That Password Protects Your AppsMonsta'd on October 4th, 2011
*EDIT: Quite a few people have reported problems with iAppLocker not working correctly. We recommend you stay away from this tweak until it's fixed. You can follow the developer on Twitter for updates. If you've already installed this and want to uninstall it check out this comment.
iAppLocker is a free Cydia tweak for your iPhone or iPad that allows you to password-protect all or some of your apps.
(There are already quite a few paid alternatives to iAppLocker in Cydia that offer this functionality, and we plan to take a look at all of them here on iPhoneMonsta.com soon.)
There are no new icons added to your device's SpringBoard with this tweak, and iAppLocker settings can be configured in your main Settings.app. (The default password is "password").