Fuck Yuo I Am a Robot are offering their album Compensator for the Accelerator for free download from their site. Infectious ass-shakin' Estonian electro-pop. Lyrics to track 2 NSFW, likewise sleeve art jpgs if you opt for the .zip download. You can sample one of the tracks, Hydraulic, on YouTube if you don't know them and would like to check them out first, though personally I can't get enough of Zukunft (direct mp3 link).
The Linux Open Source Sound Project. Music made with open source software, published under a Creative Commons Sampling License, to download (or if you've created some yourself, upload). Each track lists the software used in it's creation. Download are mostly Ogg Vorbis (naturally). Mostly electronic music (in case you were wondering).
Kevin Blechdom is a girl. Along with Blevin Blectum, she was once 1/2 of the duo Blectum from Blechdom (R.I.P.). Kevin is now a solo artist (as is Blevin) living in Germany. Her website is chock full of fun and embarrassing things, such as dirty comics, her homemade patches for MAX/MSP (an amazing virtual synth program), the Blectionary (in case you need help deciphering her world), and four songs from the hit Broadway and theatrical musical 'Annie' as performed by a (hopefully) preteen Kevin. Complete table of contents here. (note: some links may be NSFW. Please be careful.)
Electronic music buffs cite Radiohead's Kid A as their best work. How many know that Idioteque, arguably the stand-out track owes a debt to Paul Lansky, sampling as it does Lansky's Mild Und Leise [mp3 file], a track composed in 1973 on an IBM 360/91 mainframe. I didn't. Should you find your interest piqued, you might want to read an interview with Lansky. If that was then, this is now: The excellent music video to Zeal [Quicktime] by Plaid, which, although a very different beast, is an excellent indicator of how far electronic music has come. [Probably NSFW].