ADRIFT is a free interactive fiction authoring system created by Campbell Wild. The name is an acronym of "Adventure Development and Runner Interactive Fiction Toolkit".
The system is Windows-based and consists of an authoring tool (ADRIFT Generator) used to write games and a runner (ADRIFT Runner) used to play them; Wild also created the ADRIFT WebRunner which allows any game to be played online in a web browser. The system allows adventures to be created through a graphical user interface without the need for a lot of programming expertise.
Kenneth Pedersen converted Donald Brown's The Beginners Cave to ADRIFT in 2018 as a demonstration of his Eamon Combat Module. Pedersen also used ADRIFT to build his original adventure Land of the Mountain King, which he later converted to Eamon CS.