The Ancient Academy is one of them.
So, why did I pick The Ancient Academy to highlight? It's a classic, low level dungeon set up with Wandering Monsters. You really can't get more Old School than that.
The map is very well done, with lots of choices for the adventuring party to make, which is always nice to see.
Did I mention it's free?
Did I also mention I'll be swapping in Stewart's other 1-Page Adventures as the week goes on? Collect them all, as the price is right ;)