PYZ is a Z-Machine interpreter for playing interaction fiction files. Text adventure games written by Infocom, such as the Zork series, used a then-revolutionary virtual machine called the Z-Machine, which saved code space on the memory-limited computers of the 1980's. People today are still writing text games, now called interactive fiction, for the Z-Machine platform. PYZ includes a mode in which you can see the instructions being executed, turned on by the --trace option. A test suite, pyztest, tests all the instructions.
FrobTADS is a complete rewrite of the Unix console-version of TADS ("Text Adventure Development System"). It uses curses (or ncurses) and provides an interpreter to play games developed with TADS as well as the TADS 2 and 3 development tools. It adds support for a number of relatively recent user interface features including full support for text and background colors, TADS 3 banner windows, and timed input. It's also much more portable and more easily maintainable, as it's built to modern Unix standards.
QTads is a cross-platform multimedia interpreter for Tads (Text Adventure Development System) games. Both Tads versions in use today (Tads 2 and Tads 3) are supported. It should be easy to port to a range of platforms, including embedded devices. MIDI, Ogg Vorbis, MP3, and WAV sound formats are supported.