itch.io

Use this plugin to pay your favorite Old School TTRPG in a Renaissance setting.

https://aventiure.itch.io/an-odd-renaissance

Cool idea and bare bones rules. I like it!

A rules-lite hack for Cairn based on the basic and expert rules (“B/X”) of the classical fantasy role playing game and other OSR games.  It uses the "Scars" mechanic of Cairn for character advancement comparable to level 4-6 in B/X and other OSR games.

https://aventiure.itch.io/bx-cairn

Naumachia provides system neutral rules for conflict between opposing ships in pen and paper role playing games.
https://aventiure.itch.io/naumachia

Really enjoy this game. I have made a (system neutral) rules supplement for naval battles which I use together with Thalassa. Its called Naumachia and can be found here:
https://aventiure.itch.io/naumachia

Great little hack!