Yeah the Xberry is pretty cool if you have an Xbox, Twitterberry is a fun way to keep all your friends up to date with what your doing and of course, the Crackberry launcher which takes you directly to the Crackberry site.
Not much, I have a couple website launchers (including CB)
E-Trade Mobile Pro
Google Maps (though now with BB Maps unlocked I use that more often)
Weathereye
Gmail App (only to find old messages, I don't stay logged in.)
Shrink It - resizes images on your berry
Capture It - Takes image of your berry's screen.
I use it to resize images on my device. I'm just too lazy to resize them on my PC and move them. Honestly, I don't use it too often..
ie - I have some images from a digital camera in my media, they are all around 2mb each. Shrink it will resize them to 320, 480, or 640 pixels, decreasing the file size..