What is a good free lock screen replacement? I tried lockbot, but it changes style on every lock, and it has some weird bug where if I use the button to lock it, it goes black, then the unlock screen appears (screen doesn't turn off). I do not care much about theming it myself as long as it has a halfway decent theme to begin with, but I do not want to pay for it (yes, I am cheap ) and want to get rid of the lag associated with the default lock screen.