3D GameStudio
- Rapid 2D and 3D games development on three different levels: 'Click together' games in the level editor - for simple games Create games in an easy C-like scripting language - for ambitious beginners Program games in C++ or Delphi - for experienced p
- http://www.3dgamestudio.com

3D Adventure Studio
- A system to create 3D adventure games without any programming knowledge.
- http://3das.noeska.com/

ScummVM
- An implementation of LucasArts S.C.U.M.M. interpreter, used in games such as Monkey Island, Indiana Jones, Day Of The Tentacle and Sam and Max. Includes FAQ, screenshots, documentation and downloads.
- http://www.scummvm.org/

Adventure Game Studio
- Allows creates graphical point-and-click adventure games.
- http://www.adventuregamestudio.co.uk/

InterAx Game Engine
- Point and click editor for creating simple graphical adventures. Includes screenshots, sample games and editor downloads, mailing list, FAQ, and purchase information.
- http://www.cognitial.com/interax.htm

Adventure Maker
- Program to make first-person adventure games, such as Myst or Riven. Downloads and screenshots available.
- http://www.adventuremaker.com/

Hungry Software: SLUDGE
- Standing for "Scripting Language for Unhindered Development of a Gaming Environment", SLUDGE is designed specifically for adventure game creation and is the language used in Out Of Order.
- http://www.hungrysoftware.com/#/tools/sludge/

MAD -- adventure game engine
- A free graphical adventure game engine, it is completely script-driven and highly customizable. Mad features an archive system, animated sprites, mp3 playback, and path finding. A beta is currently available.
- http://mad-project.sourceforge.net

Insanity Games
- Makers of AdvEngine, a graphical point and click adventure game engine in development for games akin to Monkey Island 3.
- http://www.drew.green.btinternet.co.uk

Twilight Software AGE Developer Pages
- The engine allows for the creation and delivery of commercial-grade first-person adventure games and other multimedia.
- http://www.twilightsoftware.com/age/