CloudFlare - Cloudflare is a global network designed to make everything you connect to the Internet secure, private, fast, and reliable.
NakedSSL - Hassle-free SSL clothes for your naked domains.
Google Project Shield - Google's DDoS protection service
Secure My Website - A pain-free service to add SSL to your site, for non-geeks
Qloaked - Painless customer SSL for SaaS businesses
redirectssl - Setup your naked (non-WWW) domain with an SSL and redirect it anywhere.