Windows Mobile Software
Windows Mobile has been around for a really long time now (debut was in 2000, yes 9 years ago, long before the concept of smartphones got popular).
My latest is a Samsung Omnia (yes, I have a Samsung phone, netbook & LCD TV), actually had this one since the end of last year.

Not actually a huge fan of the Samsung interface, so I've decided to post a blog on how with a few software additions a promising (very pretty device) but flawed Windows Mobile device has been one of my better phone experiences.
Start with base Omnia and add several pieces of SPB House Software (really recommend the SPB Shell 3.0)

Get the Verizon update to unlock GPS
Get bing for mobile (includes maps, directions, places of interest) and bing tones if you would like
Windows Messenger for Mobile, check out the free extras here (ringtones, games, themes, wallpapers)
And a little Viigo
and make sure and use MyPhone to backup and protect your data for free