BlackMe is a tool that turns the screen off while you don't need it.
You can use it while logging gps data (for example with WMMiniGPS), when you connect your device to the desktop to sync/recharge it, when you're listening to music with an mp3 player, etc...The best method to use this program is to associate a button to it (through Settings->Buttons)
PopClock - this application is a clock which works like a screen-saver. While the app is working, if you leave your mobile phone be for a few minutes, the clock appear in your screen. Please touch the clock, and it will be hidden at once. Time from disappearing of the clock to the next display can be set by pushing the option button
PocketCandy is not a screensaver itself, but allows your PocketPC to run screensavers after a specific period of no user interaction, just like your desktop computer
TimePiece is a skinnable analog clock for PocketPC's! The background that the clock is displayed on and the face that's used on the clock is configurable, as well as the settings for the clock's hands. Currently there are no digital clock settings, but there are plans in the future to include digital clock and date functionality.
You can create skins for TimePiece
HAL9000 for Pocket PC - A novel screen-saver-esque application where HAL 9000 periodically speaks.
"The 9000 series is the most reliable computer ever made."
"I'm sorry, I'm afraid I can't do that."
"Daisy, Daisy, give me your answer do
SaverPaq for PocketCandy - The PocketCandy SaverPaq contains a set of 8 screensavers for PocketCandy. These screensavers may bring back fond memories of those college days of using UNIX machines in the computer lab, or of course they may bring back torturous days of late nights coding to meet an assignment deadline)
The PocketCandy FractalPaq contains Fractal related screensavers for the enjoyment of those who are either experienced mathmeticians or those who just like enjoying beautiful, mathematically rendered images