|Engine developer||Stefan Jokisch, dreammaster|
|Companies that used it||Infocom and others|
|Games that use it||innumerable games|
|Date added to ScummVM||2018-12-09|
|First release containing it||None|
Frotz is the most popular Z-machine implementation, developed by Stefan Jokisch to play games adhering to the different Z-machine versions of text-based games, first introduced for the Zork series and following games by Infocom, then later Graham Nelson's Inform that became the de facto standard for interactive fiction.
A work-in-progress sub-engine of the new Glk API has been added based on Frotz.