Night Owl Games makes a fun series of games based on the original D&D rules in a variety of genres.
One of my favorites is Freebooters, a retro-clone based on the Age of Piracy in the Caribbean. It’s got rules covering ship battles, boarding, and voodoo. It’s short, succinct and gives a lot of useful historical info for running piracy-themed games.
I’ve made my own custom fillable character sheet. It was designed to be printed on cream colored or brown paper.