The Adventure Game Toolkit is written by David R. Malmberg and Mark J. Welch. The system components which can be downloaded are as follows:
Turbo Pascal source code for AGT 1.7. Also contains the AGT manual and AGT source of Colossal Cave (350 points version).
John Menichell took AGT version 1.7, made the interactive with the player much more Infocom-like, and called it AGT 1.8