List of free SSL stuff for developerππ½
If you're looking for all programming tools around SSL (not just free). Check this page List of SSL Programming Tools

Let's Encrypt
Let's Encrypt is a free, automated, and open certificate authority brought to you by the nonprofit Internet Security Research Group (ISRG).
Tag: SSL
automated and open certificate authority

SSL Server Test
A comprehensive free SSL test for your public web servers (Powered by Qualys SSL Labs)
Tag: SSL

Cloudflare
Here at Cloudflare, we make the Internet work the way it should. Offering CDN, DNS, DDoS protection and security, find out how we can help your site.
Tag: CDN, SSL, DNS, security
Fast, easy-to-use DNS Free automated SSL certificates Global content delivery network (CDN) Unmetered mitigation of DDoS attacks with up to 67 Tbps capacity Up to 100k Workers requests and 30 scripts 3 Page Rules

DDOS-Guard
Powerful and complete DDoS Protection for your business. Remote website protection, protected hosting, VDS and more. Instant Activation and 24/7 DDoS Response Team.
Tag: SSL, security
1 Domain Protection, free SSL certificate, Protection up to 1.5 Tbps and 500 Mpps