I was on the web, then I came to a link to this site.
http://www.realmcrafter.com
I read through it and thought this was pretty cool.
Here is some cool features of it.
-You can use Blitz Basic(Blitz 3D or Blitz Plus) code directly in your MMORPG.
-No Royalties and no splash screen needed/required. You can sell your games and charge people to play it if you wanted to.
http://www.realmcrafter.com/pages/user/index.php?page=11
-Not that bad for 50 dollars for normal version and 110 for Pro edition.
-You can write scripts for it.
-You can use your own models if you wanted to.
I say this is pretty cool and well designed for what I seen.