Worth noting that Actalis requires you to register an account with them in order to acquire the necessary authorization token for their ACME API. This poses a privacy/anonymity issue for some users. Last I checked, Actalis' free tier didn't support SAN either.

Add.: I created an account just now to see "what's what" and also found the notice, "Activate your free 90 days certificates. At the end of the free year, the services associated with the certificates will expire." which sort of sounds like it's just a 1-year free trial.