SSL For Free!

CAcert.org is a community-driven Certificate Authority that issues certificates to the public at large for free.

A Chinese Certificate Authority, which focus on Transparency. They are giving away free SSL too.

StartCom offers the free (for personal use) Class 1 X.509 SSL certificate "StartSSL Free", which works for webservers (SSL/TLS) as well as for E-mail encryption (S/MIME). StartCom also offers Class 2 and 3 certificates as well as Extended Validation Certificates, where a comprehensive validation (with costs) is mandatory.

Wildcard SSL Certificates & 2048 Bit Extended Validation EV SSL Certificate Authentication. Strong Secure Sockets Layer Https Encryption for Network Security.

VeriSign Authentication Services provides solutions that allow companies & consumers to engage in communications & commerce online with confidence. VeriSign Authentication Services include SSL Certificates, Extended Validation SSL, two-factor authentication, identity protection, code signing & public key infrastructure (PKI).