iTunes Control Scripts 0.1 (by Heiko Kretschmer)
I needed a way to control my iTunes running on my other Mac - since I found nothing which fits my needs I made up my own (as usual).

You Control:Tunes 1.3.3 (by You Software)
You Control: Tunes is a free utility that gives you complete control over iTunes from the Mac OS X menu bar

You don’t have to stop whatever it is you may be doing, switch to iTunes, take care of business and then go back to your original app.

Adium iTunes Controller 4.1 (by reikonmusha)
Adium iTunes Controller is an AppleScript Package that allows you to remotely control your iTunes client using the Adium IM chat client.

ITunes Current Song Menu 2.1 (by AlphaOmega Software)
ITunes Current Song Menu allows you to display the song currently played by iTunes (and other information) in the menu bar and to search for the lyrics of this song.

FastTunes 1.2.3 (by Toon Van Acker)
FastTunes is a utility that helps you control iTunes.

SizzlingKeys 3.0.8 (by Yellow Mug Software)
4iTunesSizzlingKeys4iTunes lets you control iTunes without leaving your current application.

Remote iTunes 1.0b Universal (by delicious:suite)
If you have ever wanted to remotely control a computer running iTunes then this is your solution.

Rate Current Song Scripts 1.6 (by Walker Publishing Unlimited)
This set of scripts was written to help rate songs on headless Macs running iTunes.

Ircle controls iTunes 1.1 (by Troll Man)
Ircle controls iTunes is a set of AppleScripts that will let you launch iTunes, start playing songs, change volume and more all without lifting your hands from the keyboard.

Play One Track Only 1.0 (by Greg Perham)
POTO does just what its name implies -- it will tell iTunes to stop playing after the current song finishes playing.

SlimServer 6.5.0 (by Slim Devices, Inc.)
Slim Devices introduces SlimServer 6.

NoteAbilityPro 2.319 (by Keith Hamel)
NoteAbility Pro is a professional music notation package for the Macintosh OS-X operating system.

netTunes 2.3.1 (by Shirt Pocket)
netTunes lets you control iTunes running on one Macintosh from another, using iTunes' native interface.

v.m.k 1.6 (by Fredrik Olofsson Musikproduktion)
This application lets you simulate a midi keyboard on your computer keyboard.

Audio Hijack 2.2.5 (by Rogue Amoeba)
Audio Hijack gives all your audio that extra bit of sweetness.