The Real Book Site
From the site:
Hello, my name is Thayer and I studied music at Berklee back when the Real Book was "illegal". I thought the original version needed some representation on the ‘net, so I came up with this site. Everything here is available elsewhere for free, so this is really just a compilation. It was WAAAAAY more work than I thought it would be, but I’ve gotten a very positive reaction from it.