Letís Encrypt is a free, automated, open-source certificate authority (CA).
The goal is to revolutionize encryption on websites,
making HTTPS implementation a seamless, no-cost option for anyone with a domain. Forget about hours
(or sometimes days) of muddling through complicated programming to set up encryption on a website, or yearly fees.
Letís Encrypt puts security in the hands of website owners.
Link to their website and more infomation