The gents over at ModMyiphone
-- known for all things iPhone tutorial-related -- have compiled the definitive list of all native apps
for your iPhone. The page includes basic info about each application they have on file, links to the developers site, and a one page description for each. They've also been kind enough to include a handy RSS
link to see what's new and if you find one they've missed, a "submit app" link to get that fixed. Nice service and it costs nothing to get involved.