Download POWDER for Windows CE/Pocket PC/Windows Mobile

Version 111, developed by Jeff Lait, built by Ilya Kasnacheev.

powder.zip preferred method, contains two CABs
powder-barebone.zip a bunch of files plus instructions
powder.CAB installer - just open it on your device
powder-ibsons.CAB Ibson the Grey's 640x480 tileset

Installation instructions:
If you're on desktop, download the first file, unzip it, transfer CABs to your device and install by opening (clicking on them in Explorer). Only install powder-ibsons.CAB if your device has 640x480 screen, activate it by going Options → Tiles → From Disk....
If you're looking from your PDA, just download powder.CAB and, maybe, powder-ibsons.CAB (see above).
powder-barebone.zip contains all the game files. Use it if you dislike CABs or if you know what you're doing, anyway.
Enjoy!

Links:

Port maintainer's LiveJournal, drop me a comment if something misbehaves.
POWDER's main website.
rec.games.roguelike.misc newsgroup, watch it for new releases!