| DM's Familiar has a basic tree-view tool in it as well - The Codex Tree. You can use it to write your adventure but you can also use it to drop in D&D specific things - rules, spells, monsters, etc. So you can have a note that has the text for your room, and a link you can click to open the monster that is there, and a link to open up the spell that is the monsters special ability, etc. Andit has a combat manager if you can get a laptop to your game table, et.c
Roleplaying Master has a tree-view tool init as well.
Dunnjinni (or however they spell it) from Fluid is a mapper and writing tool combined. My understanding is that it is the part that was pulled from E:Tools. | 
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