Here’s what I have on my Pocket PC. The caveat is that I don’t really use mine much these days and haven’t really been actively seeking out new software of the last six months.
uBook - best eBook program out there. Can reformat just about any type of document into a palatable ebook.
eWallet - an encrypted PPC wallet for bank info, credit card numbers, or anything else you want to store in it. You have to type a pin number into it to access the information.
Listpro - Just a simple list ticking program. Great for shopping and to-do lists and remembers previous entries so all you have to do is unhide them and untick them if you want to put them on your current list.
Resco File Explorer - Replacement for the crappy built in File Explorer to make it a lot more navigable and feature rich.
Calligrapher - Beefed up and much more accurate version of the handwriting recognizer in WM2003.
Textmaker - An absolutely phenomenal replacement for crappy PocketWord, has all of the features of MS Word 95.
Planmaker - Same thing as Textmaker, but for Excel.
Pocket Informant. A much better PIM, fully-featured than the default one.
Looks a hell of a lot better too.
PocketMVP - Great video and audio player for your Pocket PC.
Vito Button Mapper - Pretty simple program that allows me to launch more than one program per hardware button. There’s a free version.
Journalbar - Today screen plugin that displays the weather, scrolls newsfeeds, gives movie times, reviews, etc.
Pocketfeed - A simple but good pocket XML/RSS newsfeed reader.
A lot of eye-candy tweaks.
And, of course, some games. You’ll have to search for these on your own, I’m sick of doing it… (edit: changed my mind)
Nethack for the Pocket PC
gfDoom
PocketQuake - sort of mindblowing how well this runs.
An assload of Popcap games - Diamond Mine, Dinomite, Mummy Maze, Candy Train, Seven Seas.
Age of Empires
Warlords 2
Morphgear (NES/SMS/TG16/SNES/GEN/GB/GBC/GBA emulator for Pocket PC)
Tower Mogul (sort of like Sim Tower for the Pocket PC)
Tennis Addict (Virtua Tennis for the Pocket PC. Control is done by drawing lines and angles with the stylus and is surprisngly versatile and intuitive)
Baseball Addict - I blow at this game.
Emperor’s Mahjonng (probably my favorite Pocket PC game. My Mom’s too!)
PocketSCUMM (for playing all the old Lucasarts SCUMM games on my Pocket PC)
Snails - Really well-done Worms clone.
I’m sure someone like Denny A. could put together a much better list. This is a pretty good list as well. The best way to find out what is going on in the Pocket PC development scene is just to read the news sites… I don’t visit many besides Pocket PC Thoughts and Pocket Gamer anymore, though.