Zoom 5.16.10

Open text-based games, digital presentations or other programs containing textual information written in older or small-scale fonts with limited sizes. The suite supports small image preview along with reading, editing and adding notes to the opened content.

Zoom is a Z-Machine, which means that it plays text adventure games written in ZCode. The original games were written by a company called 'Infocom' in the 80's: these are available on the Infocom Masterpieces CD, published by Activision. Unfortunately, Activision seems to have lost interest in this title - however, there are a few companies that have a stock of this CD (I bought mine from here).

In around 1993, a compiler called Inform was released that allowed ordinary mortals to create their own ZCode adventures. This sparked quite a revival, and there are many games available for download here:

ftp://ftp.ifarchive.org/if-archive/games/infocom/

The Mac OS X version supports all the features of the X-Windows version, has a much better user interface, and supports several extra features, such as speech output.