http://www.inform-fiction.org/I7/Inform%207.html
Inform is an IDE for making interactive fiction (text adventures.) I've never made one before but I've played a fair amount of community-released IF. It's a scene comparable to the quake mapping/modding scene, in the sense that the user-made stuff often meets and surpasses the quality of the pro stuff, they actually make their own tools, they have archives and review sites, etc.
Anyway, the main feature/scourge of this new version is their natural language interpreter for programming. This is actually pretty frustrating to use for a programmer like me, but might actually be good for non-programmers (since the target audience is writers, this makes sense.)