Getcomics.org - not a tracker, but a huge collection nonetheless.

MyAnonymouse is fantastic. Open invites every month or so, easy interview if you read the rules, great perks with small single digit donations, well worth it. Audiobooks, radio shows, novels, textbooks, you name it. No porn but plenty of adult stuff too. Some recent comics series I got turned on to through there - Die, East of West, Monstress, Sunstone, The Wicked and The Devine, and much more.

MAM has some comics and manga, but its not extensive.

Idk, have you tried annas archive? Or fmhy?