We all love free stuff and I especially love the free SSL certificates from LetsEncrypt, but unless you’re a dab hand at the CLI and can ensure you get the right spellings of your IIS bindings and Web roots, or have an administration website like Plesk (which I highly recommend!), it would be nice if there was just a nice simple GUI to do it for you.
So, hunting around, I see a few free programs, but some of them are either limited to 5 sites or are not for commercial use, but I stumbled across a great CLI client called WinCertes! It didn’t seem to have any limitations and does the job brilliantly. Except. It’s CLI only.