Following the trend launched by phpmmorpg, there seems to be a related called MMORPG maker. It is not really the same idea because it's rather an initiative than a complete toolkit. The point here is more to have a place to discuss indie MMORPG development...

MMORPG Maker is a site devoted to supporting people that want to make their own MMORPG, including info on model making, engines, networking, etc.

Now you can use software engines, like Realm Crafter or the Torque MMOKit, to develop your own MMORPG, even if you aren’t a C++ guru. If you want to find out more, just jump into the forums. We’ve also got information on making 3D models, discussion on general MMORPG design, and a lot more to get you started!