Okay, here's a potential Sticky
Which programs do you find utterly impossible to be without on your handheld device? (Oi! None of that you dirty-minded herberts!)
For me it'd be:
WiFiFoFum - A very nifty little wifi networks detector, especially in my case as it's about the only thing that will prod my wi-fi connection into life..
SPB Pocket Plus - Incredibly useful little set of utilities, the X button actually closes applications rather than just minimising them, the today plugin which enables you to put shortcuts in a useful place, along with battery and storage meters. and multiple PocketIE tweaks (fullscreen mode, multiple windows, Save As, etc etc)
PocketMVP - Replaces Pocket Media Player quite nicely, also supports a lot more formats.
Over to the hordes