itbusiness.ca has the run down on Six free downloads to fire up your Blackberry, including an RSS reader (Viigo), Google Maps, Facebook for the Blackberry and of course, a twitter client (TwitterBerry).
I have tried the Facebook app (it came with my Blackberry) and have preferred to simply surf to the Facebook site itself. But I recommend you try them yourself. Hey, they’re free! 🙂
Smart People I Know 