http://zeldaclassic.armageddongames.net/
this site is a community site where people can create their own Zelda adventure (on PC!) and post them there for rating !
, you can find there all the necessary tools and tutorials for creating your own zelda quest , the base engine looks like the old NES zelda but you can make games look like the gbc/SNES zeldas (there's different settings) .
I think I found my new obsession
I wish they ll make soon a N64-like zelda community with similar worldbuilder and tools