The New Releases page lists all files hosted in the Museum of ZZT's file archives sorted by release date. This is essentially a full list of all files hosted in chronological order of release excluding unpublished worlds (which may be found on the Upload Queue page).
For many files these dates may not be completely accurate. In instances where the release date cannot be determined with reasonable accuracy, "Unknown" is used instead.
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! X was a transitional version of Plastic! between the stable Plastic! 2.0 release and the later Plastic: Retrofreedom.