Let’s Encrypt automates SSL certificates, for free, which is all kinds of great for the web. It’s now in public beta:

We have more work to do before we’re comfortable dropping the beta label entirely, particularly on the client experience. Automation is a cornerstone of our strategy, and we need to make sure that the client works smoothly and reliably on a wide range of platforms. We’ll be monitoring feedback from users closely, and making improvements as quickly as possible.