Listed are contributors to ZEngine: (Contributions are always welcome)

James Turk james@conceptofzero.net - Core Engine, Design, Docs, and Classes
Kevin Watters kwatters@adelphia.net - Fix to ZImage::SetColorKey
Atani atani@atani-software.net - Revised Linux Build System
Stinus Petersen (bison@flytlet.dk) - Fix for ZImage::OpenFromImage with alpha images