Drive safe.ly is a great idea but a w**k app and you don't really need Xenozu as you can just use m.youtube.com.
I've got very few apps TBH, mostly as the 9000 suffers badly with application memory leaks and well a lack of application memory in the first place, but those I do have are:
BeBuzz (paid)
SportyPal
Capture It
tumblr (although I'm about to delete it as I never use it)
BB App world
Facebook
Twitter
Google Maps
MSN Messenger
And that's it, unless you want to include BB messenger in there too.