Love the idea of this thread - great to get a directory of services offering Let’s Encrypt.
I’m a co-founder at https://thisistap.com. Just a quick note to let you know that we’ve got the LE API integrated and are testing it over the weekend with a view to rolling it out next week for our pro sites as standard. Obviously SSL will be free to all users and we want to be transparent about our offering so please include us in the list. We’re also rolling out HTTP/2 support as we speak to support the LE SSL offering.