Some of you may or may not have come across this in the app store. LokLok is a lock screen replacement for your Android device. What makes this one special is that it has a "social" twist to it. You can set up groups and share a lock screen. Essentially it is a community whiteboard that everyone in your group can use to send quick messages back and forth. You can add pic, draw over anything or erase and start from scratch. Its also completely private. You can have multiple groups as well. Only need to swipe to the left to change group on lockscreen. Nobody can search for you. Only people you know that use the app can send you an invite. It is currently in open BETA on the play store and is completely free. Check it out!