Blinker The midlet either paints a black or a white screen. Switching happens when any key is pressed. Usefull? I don't know... maybe? (perhaps when stopping a buss in the dark!? or some sort of signalling)
DiscoStrobe Enhanced Hypnotic A small application that changes the color of your screen like a disco light. The Enhanced version can be used to hypnotize people!
Oscillations This program is a makes a nice sweeping color sweep over your screen. This program is totally free with no activation codes or ads