Many utilities do one or the other, but not many give you the ability to perform all of these actions.

One of the best features of this app is that you can skin it. You can change the background easily by looking in the app's folder. Advanced users can edit the files to make their own theme.
More info about skinning here.

Features:
- Shutdown actually works.*
- Fully skinnable, will work in any resolution.
- Full screen mode.
- Sleep / Light's out modes.
- Command Line (see "Usage").
- Map to Long press (instructions from fards).

* Should work on HTC devices since the Kaiser.

Usage (Command line):
You can call xdaShutdown command line as follows:
xdaShutdown /restart [/warn] - Soft resets the device.
xdaShutdown /shutdown [/warn] - Power off the device.
xdaShutdown /sleep - Put the device in Sleep mode.
xdaShutdown /lightsout - Turn off the screen.
/warn - issues a warning before performing the action.

Todo:
- Option to map to the power button.
- Seperate Sleep / Light's out buttons.
- Icon resources for shortcuts.
- Landscape theme support.
- Custom Action Buttons?
- Make it so we can have a semi transparent wallpaper that is your device's desktop.
- Today plugin?

Known Issues:
- Remove 1px border around the BG.
- Consider stop using KernelIOControl and use ExitWindowsEx().
- Shutdown Support on Atom Life, Omnia (II?).
- Forgetting settings on Reset / Shutdown?

Download links:
- QVGA: here (276 KB) or its mirror here.
- WVGA: here (428 KB) or its mirror here.
- VGA: here (248 KB) or its mirror here.

Update Description:
v1.00:
- Initial Release.