iSpring TalkMaster is described as 'Create interactive conversation simulations to train your employees for real-life conversations with clients and associates. Add the appropriate characters and backgrounds to fit any business situation and publish for any device to share on the Web'. There are eight alternatives to iSpring TalkMaster for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is Twine, which is both free and Open Source. Other great apps like iSpring TalkMaster are Chronicler (Free, Open Source), TalkerMaker Deluxe (Free, Open Source), Ink by Inkle (Free, Open Source) and Dialogue Designer (Paid).
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).
Dialogue Designer is a powerful (but easy to use) branching dialogue editor designed for story-driven games like RPGs and Visual Novels. Create complex non-linear data structures in minutes, no programming experience required!
Yarn Spinner is a tool for creating interactive dialogue for games. Write your conversations in Yarn, a simple programming language that's designed to be easy for writers to learn, while also powerful enough to handle whatever you need.
TalkTree allows you to create complex dialog trees for story- driven games, RPGs, and more. Using a simple, easy to understand flowchart- style design, the editor allows you to make every conversation in your game work detailed and fucntional.