Quest is a free and open source tool which allows you to create text adventure games (like Zork or Hitchhiker's Guide to the Galaxy) or interactive choose your own adventure books, like Fighting Fantasy or Goosebumps).
You can download them for PC or play them on a browser, and you don't need to know code to do it! Quest uses mark-up language to add interactivity to your stories. You can also add sounds, music and images as well as embedding videos from YouTube or Vimeo. Quest also comes with support for 9 different languages.