I wanted to put together a somewhat comprehensive list of content packs since there's so much more out there than the four packs at the bottom of the site. I also organized them to make it easier to find certain types of props like vehicles or payload models. Right now it only has stuff from TF2maps.net but I'll try to update it with anything neat I find. Maybe you can get some use out of it.
https://docs.google.com/spreadsheets/d/1ER8GM0kJ8pQ7qcj-biv7Sw2tnsByU7klr0eOgOjFq3Q/edit?usp=sharing
https://docs.google.com/spreadsheets/d/1ER8GM0kJ8pQ7qcj-biv7Sw2tnsByU7klr0eOgOjFq3Q/edit?usp=sharing