Corey Ryan Walden's The Cliff-Lair of Heeteris a small adventure site for 4-10 adventurers of levels 1-3, to be played under the Original D&D rules and clones of the same. Due to the simplicity of those rules, it would be fairly easy to adapt the work for play with other TSR-era D&Ds or their OSR equivalents. It's not free, unlike a lot of what I review, but it's modestly priced at $1.99.
