StartSSL SSL Certificate

StartSSL brands themselves as  the "Swiss Army Knife" off SSL Certificates.  They have a free one called "StartSSL Free" and if you want a certificate capable of wildcard functionality and multiple domains you can upgrade to "StartSSL Verified".  The "StartSSL Extended Validation" certificate caters to people who require the green trustbar in the url box.  Below is pricing for their products.

StartSSL Free Free
StartSSL Verified $59.90
StartSSL Extended Validation $199.90