Inform is described as 'Free app for creating works of interactive fiction, available for MacOS, Windows, Linux and Android. Inside it is a powerful programming language based on English language text. This redesigned website is part of the preparations for open-sourcing the software' and is an app in the development category. There are more than 10 alternatives to Inform for a variety of platforms, including Windows, Mac, Self-Hosted, Linux and Web-based apps. The best Inform alternative is Inky by Inkle, which is both free and Open Source. Other great apps like Inform are Ink by Inkle, QuestJS, Dedalus and ifSpace.
Ficdown is a set of standards using the Markdown formatting syntax that can be used to create choice-based interactive fiction. Formatting of text is done using standard Markdown, with a few Markdown elements taking on additional story-defining properties (for example, level-two...
Adliberum Engine is a multiplayer compatible role-playing text adventure engine. Complete with real-time world-building commands; craft text powered games and scenarios alone or with others. Complete with world editing commands; create worlds, games and puzzles that you can...
Adventuron is a text-adventure authoring tool, used to create games playable on desktop, mobile as well as old computers including Amstrad CPC, Commodore 64, ZX Spectrum. Featuring a web-based code editor with autocompletion and a fast development workflow that lets you play as...
Squiffy is a tool for creating multiple choice interactive fiction. It's written entirely in JavaScript - the compiler uses Node.js and the games it generates run in a web browser so it can run on any system with a modern browser.
Spatterlight is a native Cocoa application plays most kinds of interactive fiction game files: AGT, Adrift, AdvSys, Alan, Glulx, Hugo, Level 9, Magnetic Scrolls, TADS (text-only), Quill, and Z-code (except v6).
Build text adventure games, role-playing games, training materials, simulations, and interactive fiction without having to program.
TADS 3 is a robust, modern programming environment specially designed for creating Interactive Fiction.
It is THE major alternative to Inform
Storyspace is a software program for creating, editing, and reading hypertext fiction. It can also be used for writing and organizing fiction and non-fiction intended for print.
Possibly the oldest interactive fiction (IF) tool stil actively developed commercially. Player is freely available.
Storyspace is the most popular commercial alternative to Inform.
JAWA is an online tool which makes it possible to create, free, easily and quickly, point'n'click type investigation / adventure games, playable directly in the browser or in the form of mobile apps (smartphones & tablets).
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Doesn't use coding. You have to add a document, unlike Inform7 where you actually code