The New Finds page lists files which are not new creations, but older titles that were not readily accessible prior to publication on the Museum of ZZT. These files come from old websites (often preserved via The Internet Archive) as well as donations of ZZTer's own collections.
This list is not exhaustive due to publication dates not being tracked prior to Nov. 7th, 2018.
Files with unknown release dates are also considered New Finds, though this isn't guaranteed to be accurate.
Appears to be an 8x14 character set <-> .COM converter.
ZZT music making tool
Expanded ZZT help file
An older version of an attempted ZZT Clone! This failed to do anything under DOSBox and on an MS-DOS system it would crash moments after loading a world.
TLDR (Plastic Music Tracker)
TLDR is an external music tracker that uses Plastic!'s .ptf format.
TLDR is largely the same as Plastic!'s in-game music editor, but has the ability to export .wav files.
Included are a number of .ptf files created using TLDR from 2005-2008.
Plastic! Retrofreedom was the final release of Plastic!, and utilized a .pworld file format incompatible with the previous .pgf file format.
Plastic! X was a transitional version of Plastic! between the stable Plastic! 2.0 release and the later Plastic: Retrofreedom.