well after 3 years of the app store, hard not to collect so many. and many many of those are freebies i download once, try, then delete out of my iphone. it's been so long though it's hard to tell what's good and what's junk.
there are a few useful web sites out there that alert you to when there is a price drop or free offering on an app, really handy if they don't have a trial available. then there are a few i've spent a few bucks on and they turn out to be turkeys.