I recently discovered something called the Hello Mario Engine, which uses Game Maker Studio or something as it's platform, and is an open source engine. So people can make SMB games and do whatever they want. It's based almost entirely around SMB3, so it isn't particularly useful for my tastes (SMW all the way).
But what do you guys think about it, if you've heard of it or played with it? It seems pretty powerful, but at the same time something just doesn't right about it... I've heard that a whole bunch of modifications can be done with the right amount of code, so it may be worth using.
I can imagine that the PGE engine/editor would be better once it's developed enough.
One day I'll release a SMBX episode...