@TDungeonator I think classes are actually a fairly uncommon mechanic. Some open source game options: Fate, Open Basic, Dungeon World, Blades in the Dark, Gumshoe. Although systems like BitD have "playbooks", they are just guidelines, and characters can actually pick any abilities. A review of the above: https://sgryphon.gamertheory.net/2022/06/04/open-source-alternatives-to-dungeons-dragons/