i have seen few requests for specific blackberry model downloads... i get my stuff like background wallpapers, ringtones, desktop themes, other apps for my pearl from:

http://www.pinstack.com/
this website is by far the my favorite placer to get all kinds off cool stuff, its the grandaddy of all BB download websites.

http://www.blackberryfreeware.com/
great applications like tip calculator, travel utilities, document readers for pdf, xls, doc etc...

http://www.gemblock.com/
just as good as the pinstack... but only available for the new BB models like 8100 or higher