EFF (Electronic Frontier Foundation) has partnered with Mozilla, Cisco, and Akamai to offer free HTTPS/SSL certificates.
The launch is scheduled for the mid of 2015, so if you considering to buy a SSL certificate, it might be a good time to consider otherwise.
Yeah I use them a lot cause it's too expensive to keep buying root CAs for every domain. But StartSSL isn't recognized as a CA by every browser.You can get free SSL certs right now, from StartSSL