- Home: http://idmillington.github.io/undum/, https://web.archive.org/web/20161202210632/http://undum.com/
- State: mature, inactive since 2018
- Platform: Web
- Keyword: game engine, interactive fiction, text-based
- Code repository: https://github.com/idmillington/undum.git (@created 2010, @stars 332, @forks 83)
- Code language: JavaScript
- Code license: MIT
- Developer: Alexander Yakovlev, Bruno Dias, David Eyk, Ian Millington, Juhana Leinonen
Client-side framework for narrative hypertext interactive fiction.