I just went caching this weekend with a Windows Mobile phone (not a Windows Phone) while my Pre 2 is being repaired. There isn't much WM software being updated now. I tried out BeeLine, GCzII, GeoScout, and PocketDrake. BeeLine and GeoScout have a trial, and cost money after 30 days. The others are free. I found PocketDrake the most usable, although far from perfect. It is buggy, and it ate my fieldnotes. It remembered that I had found the cache, the time and date, but the text was gone. I didn't try the direct upload for the notes, I just saved them.
PocketDrake accepts GPX imports, and even displays the listing correctly if it has HTML and pictures. It also has nice features like an audio alarm as you approach the cache and a 'radar' display when you're close. It is hard to describe, you'll have to try it out.
