I put together a bunch of reference sheets for my own OSR house rules. These rules are generally based on old D&D such as the 1981 version by Moldvay, Cook, and Marsh (B/X). But also on Swords & Wizardry White Box. This is incomplete, but since I am pausing this project for a bit I figured I'd share the whole current series for those who might be interested. Roll some dice!