Indeed it is.
The server code is good, but the client... well that is a bugger. So we have been trying to integrate the server code with Unity. The Smoo Online is an example of it. But looks like still having some issues. Hoping to have that server code available for release soon. It has been modified since Multiverse went out of business.
Unfortunately the server code will not be free...
HOWEVER there are two items to note. One, this server code is not the same that is publicly available*, I guess you can say it has been forked. The second, is I am quite certain I can provide some free licenses for those of you here.
Unfortunately I have been in conflict locations and don't get the time to much development, which is why I'm trying to just do what is suppose to be a simple browser game... heh. I have to get in contact with the group to see how close or far we have left to go.
* This was made in a separate agreement with Bill (CEO) of Multiverse before the code was release for public.