Journey of the Sorcerer - The Eagles.
Or “the theme from The Hitch-Hiker’s Guide to the Galaxy”, as I knew it as for about three years. XD
Nami Tamaki - Heroine
Although some of her stuff is typical pop music, many of the songs she sings are particularly powerful. At least four of her songs are used in the Gundam Seed anime as well. I highly recommend her albums, especially for the songs “Realize” and “Heroine”.
Disorder by Joy Division
Neural Rust by Porcupine Tree
Can you say “Masterpiece”??!
10 000 days by Tool again.
Chihiro Onitsuka - Koe
the soft hum of the computers fan and the really annoying light buzzy/high pitched sound of my batteries recharging.
Battles - Atlas
Sundall Song - The Apples in Stereo
…And if any of you have heard of that song, I will most definitely be giving you cookies. No, really. Nobody I know has heard of it. 
And it just switched to Ivor Cutler is Dead by The Bobby Mcgees. Such an awesome song!
Whatcha doin’ here Daz?? 
Amplifier - Procedures
I just- just missed you so much. I couldn’t take being away from you any longer! Take me now!
Postcard of a Painting - Maximo Park
Pure Reson Revolution - He Tried to Show them Magic!/Ambassadors Return
Aren’t you underage?
Actually, I’m not. In fact I’ll be 18 in September. Unf, unf.
Romeo and Juliet - Dire Straits.
“Castle in the Mist” from ICO.
A weekend in the city by Bloc Party holy hell what a fantastic record!
Um, more specifically, Uniform.
Further by VNV Nation.
The Unexpected Enemy - Panzer Dragoon Zwei Soundtrack
(god, I love this song)
Beck - Loser
So awesome.
Pelican - Autumn into Summer
(thread bump)
Si mon rêve - Avec elle.
By the way, a really good site for free music is Jamendo. Go to jamendo.com/en/ if you’re after something new. They host thousands of albums in MP3 and OGG, all released under the Creative Commons license so the music is completely legal.