Clickable:

http://wikifonia.org/browse

Seems okay but could be better - I just had a look for "Over The Rainbow", but you can't get things sorted by title so I had to use the search box. 595 hits, of which 2 were the right song.

I was able to search, transpose and download without logging in. What else can you do with a signup?

(BTW blue clickies like the above are much easier to make with a tabbed browser likw Firefox).