I really liked The Beast that Waits from Three Sages Game, it was an excellent sandbox-ish title. However, I'm guessing I was one of the few that even noticed it, since they have moved on to other game systems, with their only other OSR module being this, Gobs of Trouble. It's a very short mini-module (priced at $1).
As the name implies, it involves trouble with goblins. A small band of them has displaced a family from their farm. The party presumably stumbles across the evicted farmers and decides to help them by retaking the homestead. If they do that and succeed, they then discover that the goblins have been in turn kicked out of their lair by an advance party of hobgoblins.