CricketMX.com

This seems just the place if your interested in any aspect of electronics and circuit design

http://www.101science.com/Swelectronics.htm

I cant begin to list all the small but useful utilities here so if you have 15 minutes to spare get your self a free copy of spice 9.1 and you need never touch a soldering iron again
very useful come school project time

There are a ton of files there. I'm not even sure where to start rooting trhough for goodies. Guess I should start at the top and work my way down.

I was just looking through here and found a link to a "TuneKit for Windows"

I couldn't stop laughing after I saw that it was hosted on an aol member site.
http://members.aol.com/maxfro/

Site appears to be down now.