Interactive Fiction Archive is described as 'The contents of the IF Archive -- including thousands of text adventures, text adventure development tools, articles, essays, hint files, walkthroughs, jokes, and sly references to Greek politics -- are contributed by the interactive fiction community, past and present'. There are four alternatives to Interactive Fiction Archive, not only websites but also apps for Windows, Electron / Atom Shell, Linux and Mac. The best alternative is textadventures.co.uk, which is free. Other great sites and apps similar to Interactive Fiction Archive are Playfic (Free), WrittenRealms (Freemium) and Lectrote (Free, Open Source).
textadventures.co.uk is a community of interactive fiction game makers and players. All games here are either playable in your web browser, or as an app for your smartphone or tablet. Almost all are free, and you can even make your own, using...
Playfic is a platform for writing and playing interactive fiction. Interactive fiction (aka "text adventures") is a genre of game that uses no graphics or sound, but instead, uses text to tell a story in an interactive world.
The Interactive Fiction interpreter in an Electron shell Lectrote currently supports: Glulx games (.ulx or .gblorb), as produced by Inform 7. Z-code games (.z3/.z4/.z5/.z8 or .zblorb), as produced by Inform 7 or earlier versions of Inform. Hugo games (.hex).