I think it is fair to say that there's been a bit of an explosion in the number of music apps available for the iPhone and iPod Touch platform. I would estimate that the number of music making apps of varying type dwarf those on both the Palm OS and Windows Mobile put together, even though the market is less than a year old.
So, since the launch of the app store, what have you discarded? Which apps, good and innovative at the time, have fallen off you device or simply out of use completely.
For me I started off with the Moo Cow apps as they came out, but find now that I don't use them at all and have removed them from my iPhone now.
How about you?