Inform 7

[AtkinsSJ]

This clever little thing lets you make text adventures, simply by writing English. (Though you still have to write things a certain way. Read the manual.) For instance, 'The Hamumu Forums is a room' will create a room (any area is a room) called The Hamumu Forums. Just thought I'd post about it.
This could be useful for anyone who enjoys making rooms for The Maze of Ludicrosity, but can't find the space. It's more complicated, but still pretty simple.
Linky (http://www.inform-fiction.org/)

[Mr.Onion]

Note: It saves in a rather strange .zblorb format.

[Ufo-Man]

I hope somebody makes a huge map to show where everything is.