Windows Frotz is described as 'interpreter that can play all the old Infocom text adventures'. There are four alternatives to Windows Frotz for Android, Windows, Electron / Atom Shell, Linux and Mac. The best alternative is Text Fiction, which is both free and Open Source. Other great apps like Windows Frotz are Fabularium (Free), Windows Git (Free, Open Source) and Lectrote (Free, Open Source).
With interactive fiction novels you're more than just a passive book reader, following the adventures of the hero. Instead, you become the hero! Explore the world, make decissions and ultimately decide on the outcome.
Windows Git is an interpreter for Glulx games. Windows Git consists of a core interpreter called Git, and an input/output library, called Windows Glk. Together these two components form the Windows Git package, which has been created by David Kinder.
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).