Tabletop designer here:
Feel free to adapt any of these but please let me know so I can check out where you took them:
- Panakizhi (also appeared in the comic Master & Apprentice as a game used to teach young magicians how to think. I'm one of the designers) https://www.kickstarter.com/projects/garagegamesau/panakizhi
- Of Stone & Wood - This one has a little bit of a story around how the game is used in the game world I designed it for but do what you want with it https://www.thegamecrafter.com/games/of-stone-and-wood
- Dealing Blows - 2 player fighting game https://www.thegamecrafter.com/games/dealing-blows
The rules for the last 2 are to the right of the page on the game crafter, Panakizhi has the rules on the KS page