NakedSSL - Hassle-free SSL clothes for your naked domains.
Secure My Website - A pain-free service to add SSL to your site, for non-geeks
SSL Alerts - Free service to send SSL certificate expiration alerts
TinyCert - Free SSL certificates for your startup.
CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
CertSimple - EV SSL certificates delivered in hours, not days