Source code for Augmented Fourth, release 3, written by Brian Uri.
Source code for Lecture Feature, by Paul Equinox Collins.
Source code for Six, release 4, by Wade Clarke.
Zork: A Computerized Fantasy Simulation Game. This is the more or less public domain version of the original MIT Zork, ported to Inform 7 by Dean Menezes. Release 3 / Serial number 080504