Some time ago the folks at Let’s Encrypt announced that there’ll be some rebranding and stuff. It seems that has materialized just now with EFF’s announcement of Certbot:
This should be really just a rebranding, no radical underlying changes. They’ve also set up a nice website for the client, though it doesn’t seem to offer much over the old docs yet. Let’s hope they’ll add DNS-01 on the list of supported verification methods soon.