Visionaire - Use Visionaire to create a complex adventure game without the need of any programing experience. This site offers information about how to use the software and what you can do with. - http://www.visionaire2d.net/index.php?newlang=english
Sludge - SLUDGE (standing for Scripting Language for Unhindered Development of a Gaming Environment) is a system by which anyone (within reason) can make an adventure game. - http://www.hungrysoftware.com/#/tools/sludge/
Wintermute Engine - Wintermute Engine Development Kit is a set of tools for creating and running graphical "point&click" adventure games. The kit includes the runtime interpreter (Wintermute Engine, or WME) and GUI editors for managing and creating the game con - http://www.dead-code.org
Interactive Fiction Authoring with IFML - XML-based Interactive Fiction Markup Language (IFML) used to create text adventures that run in your browser. Includes a sample game with IFML code, documentation, tutorials, downloads, mailing list, and a forum. - http://ifml.sourceforge.net
CMU SCS OZ Project - Develops technology and art to help create high quality interactive drama. This especially means building believable agents in dramatically interesting micro-worlds. - http://www.cs.cmu.edu/afs/cs.cmu.edu/project/oz/web/