Here is some free stuff that I’ve made over the years. I’m a big fan of CC BY-SA 4.0.
One Shot World is a hack of Dungeon World that removes most of the long-form mechanics and replaces them with simple rules designed to facilitate one-shots and short campaigns. There are also some useful tools in the GM Booklet (session starters, worldbuilding tips, etc) that would work for other systems, as well.
When I first discovered Dungeon World, I was overwhelmed by the incredible amount of 3rd-party resources, playbooks, hacks, etc that folks had built for the system. So I decided to chronicle my findings. Over the years, this document has become the go-to point of reference for many new GMs & players alike.
Keys are goals, ties, beliefs, or vows a character has. They are meant to replace Alignment or Drives completely. Shamelessly stolen from better designers.
A fairly concrete method for treating locations as monsters.
An alternative spellcasting playbook to the Wizard, that doesn’t require spell memorization, and uses CHA as a prime stat. I’m pretty proud of the move titles.
A simple adventure site for Into The Odd: Electric Bastionland, or similar rules-lite OSR games.
When I started running Into The Odd, I again found a system with a veritable bouquet of excellent tools, hacks, tips & resources, but no single place to keep all of the relevant links! And thus the Syllabus was born.
An overpowered alternative magic user.
A game about a generation ship, and the factions (and subsequent generations) living within.
A guide on collaborative worldbuilding and character generation.