The Tomb of Gardag the Strange is a recently published Pay What You Want module for four to six third level characters. Shane Ward (3 Toadstools Publishing) wrote the module for Labyrinth Lord, although it could be used with other OSR games or the classic RPGs that inspired them.
Let me start out by saying that this is an endearing project. It was clearly written by someone who has a lot of fun playing RPGs and wants others to derive enjoyment from his work. To the extent that payment is requested, I think it's fair to assume that Ward is only seeking to cover the costs involved in taking his DM notes and converting them into a product that someone else could use. But that's where the problem begins. However much I want to like The Tomb of Gardag the Strange, it hasn't finished the transition from the notes someone took to help themselves to a product designed for another party to use. Ward has alluded to this on his blog in response to other reviews, suggesting that he "may have had it in mind that the adventure could be used as a funnel" (though presumably with 1st-level characters, rather than 0th-level as in Dungeon Crawl Classics).