Twinery.org provides an open-source platform for creating interactive, non-linear fiction. These stories are called Twines.
Their history and widest use has been for interactive games but I like the idea of them being used for interactive fiction more. Interactive fiction has really expanded in recent years with the use of apps such as Episodes and Chapters.
Have a look at my simple Twine. The Mirror
The software is really simple to use and very rewarding. Did I mention it’s completely free?
Why not try it and create your own Twines?
Let me know how you get on.