Wiimm's CT Archive is an archive of almost every custom track available for Mario Kart Wii, however, its web interface can be cumbersome to browse, and its often easier to use the Custom Track Wiiki.
This project is intended to make browsing the archive easier, and eventually introduce extra features only possible on a local browser.
Although the archive is no longer being updated, its successor is currently still early on, and therefore it serves as the best current option.
Currently the project is at a basic stage, featuring a python based script allowing the retrieval of track-info and track downloading.