Mac users interested in Spatterlight for games generally download:
Spatterlight is a native Cocoa application that plays most kinds of interactive fiction game files: AGT, Adrift, AdvSys, Alan, Glulx, Hugo, Level 9, Magnetic Scrolls, TADS (text-only), Quill, and Z-code (except v6).
Spatterlight also supports the Treaty of Babel standard for cataloguing bibliographic information about interactive fiction.