Twine

Twine is an open-source tool for telling interactive, nonlinear stories.

Free Open Source Mac OS X Windows Linux

Chronicler

Chronicler is an open source desktop application which allows users to create CYOA/MCG (choose your own adventure/multiple choice games) interactive fiction using a GUI not dissimilar to Twine (i.e. in the style of a flow chart).

Free Open Source Windows Linux

Inklewriter

Inklewriter is a free tool by inkle, designed to allow anyone to write and publish interactive stories.

Free Web

articy:draft

The first professional tool for story and game design Create, organize and communicate your game vision. Compose every aspect of your game design in just one highly visual and versatile solution.

Commercial Windows

TalkerMaker Deluxe

A fairly bare-bones FOSS alternative to applications like ChatMapper and articy:draft to allow for people who don't necessarily have the money to license those...

Free Windows

iSpring TalkMaster

Create interactive conversation simulations to train your employees for real-life conversations with clients and associates. Add the appropriate characters and...

Commercial Windows