The maze file archive mentioned in my earlier post has been updated and the maze files moved to their own repository on github. The new set is better organised and contains many new mazes, including those from the New Technology Foundation archive.
https://github.com/micromouseonline/mazefiles
This repository contains only maze files in human readable text file format.
The maze tool repository will soon be updated to work with this repository as its definitive source of maze file data.
The NTF list is here:
http://www.ntf.or.jp/mouse/history/index.html
If you have any maze files – any size, any format – please submit them to the repository or send them to me for inclusion.