Unless you're a mega-loser you have an iPhone by now.  I kid, of course, but many, many people do so I thought I'd round up a few of my favorite iPhone music apps and share them here. 

BeBot - This isanely fun little app features a cartoon robot who will "sing" robot noises depending on where you drag your finger.  You can adjust everything so there are endless combinations of sound to discover.  It's even useful for musicians, according to Morgan Z. of Apes and Androids, who introduced me to BeBot as an alternative to fiddling with keyboards and synths for quick robot-y sounds. 

Beatmaker - Tap on stuff?  Annoy your friends and family?  Why don't you buy Beatmaker, an insanely intense (you guessed it!) beat-making iPhone app.  It's on the pricey side (almost $20 for the app) but if you feel the need for a mobile drum machine, it seems to be unbeatable (pun intended). 

Midomi - This one impresses me to the upteenth degree.  It's essentially a shortcut to the iTunes store, but that's not really the fun part.  The fun part is a feature built into the program.  If you ever get a song stuck in your head, open up Midomi, hum the tune and chances are, Midomi will tell you what it is.  Or, if you're listening to a song and want to buy it, hold your iPhone up to the speakers and it will identify it.  Amazing. 

Chordmaster - For any guitar guys out there, this one is invaluable.  It's very simply a massive database of guitar chords - all of them - and gives you the option to hear the chord, see the chord, hear each note of the chord and strum the chord, all on your phone. 

More Cowbell - Stupid?  Yes.  Fun?  Hopefully.  the More Cowbell app borrows its name from the famous SNL skit featuring Will Ferrel as an overly excited cowbell player.  Now you can pay a dollar and compete with "cowbellers" across the Internet thanks to More Cowbell.  This is in here for fun, and that's exactly what it's meant to be.  If you're a serious music guy, don't buy this (there is only one cowbell option, for instance), but if you want a vaguely music-related app that can annoy friends then sir, I think I've found what you're looking for.

Got any suggestions of your own?  Leave them in the comments.