QTads is a cross-platform, multimedia interpreter for Tads games: it allows you to play adventure games developed with the Tads authoring system. Both Tads versions in use today (Tads 2 and Tads 3) are supported. It has been tested in Linux and Mac OS X, but it should compile and run in many more. "Tads" is short for "Text Adventure Development System."
Games that can be played in QTads can be found at the IFDB: