Are you thinking of startssl - http://www.startssl.com/?app=1 ? They have a
free cert, but I don't know how good it is compared to a self-signed cert.
Their web site looks like all the other "free ssl cert" web
sites......check your wallet at the door! ;)

Mark

IIRC startssl is (or was) included in the base ca cert bundle, which is pretty much all you really need. It costs nothing. They look for verification via SRV or a text file in a given subdomain to prove you own it (i.e. the same thing every other SSL provider does).