Favorite Free Oldschool Adventures and Locations

(I think Dan's list of favorite things might have inspired this post. I honestly don't remember. It's good though, so check it out too.)

Want to grab a bunch of content from the internet and just run it without spending money on adventures/settings and without spending time making your own stuff?

Here are the very best I've found. These are quality.

• Fomalhaut and other adventures by Melan (Gabor Lux.) Not all of these are free.
• H.M.S. Appolyon and Fallen Empire
• Tomb of the Serpent Kings

Useful but I don't have enough experience with them to consider them favorites:

• Trilemma's one-page and two-page adventures
• Dyson Logos adventures

What did I miss? Tell me in the comments.

Submitted recommendations I can't personally vouch for:

One Page Dungeons (you'll have to sift through them for the good ones yourself. Comment with your favorites and I'll add them.)
Secret Santicore (see above.)