http://scirra.com/index.php
Development studio geared for creating DirectX games and software in a WYSIWYG environment.
Wintermute Engine Development Kit
http://dead-code.org
To create graphical “point&click” adventure games - Dirty Split from games post is made from this tool.
Adventure Game Studio
http://www.adventuregamestudio.co.uk/
Name says it all
3d adventure studio
http://3das.noeska.com/default.aspx
In Alpha build stage
Sphere RPG Engine
http://www.spheredev.org/wiki/Sphere
To make Rpg's similar to what's found on SNES and Sega Genesis
Hephaestus RPG Maker
http://markdamonhughes.com/Hephaestus/
Inform 7
http://www.inform-fiction.org/I7/Inform%207.html
a design system for interactive fiction
TADS
http://www.tads.org/
Text Adventure Development System
001 Action RPG Maker
http://www.engine001.com/gamemaker.htm
I'll add more when find them or let me know here - Has to be FREEWARE
