» Interactive Fiction Authoring with IFML    XML based markup language and game playing engine for creating and playing text adventures. Uses a screenplay metaphor. Authors create scenes, dialogs, props, and characters.    http://ifml.sourceforge.net

» JACL Adventure Creation Language    JACL is an interpreted computer language for creating web-based adventure games. This site contains downloadable software, documentation and sample games.    http://jacl.sourceforge.net/

» QML    The Quest Markup Language is a free Choose-Your-Own-Adventure system. The XML-based games can have images, sound, states to check, and random events.    http://questml.com/

» ValerieMates    Program for creating choose your own adventure games.    http://www.valeriemates.com/interactive_story.html