1. Carts
2. traps against animals, would work against humans but they are quite obvious to humans if they know what to look for.
3. Make use of streams/wind through mechanical methods, waterwheels/windmill to provide power, would make being near a river a lot more important for some tribes/homesteaders. Power could provide a mill for milling grain to make bread, could be left unattended. Could allow apparatus for speeding up crafting higher lvl recipes etc.
4. mining for resources such as coal to provide steam power for vehicles/motors if they were ever introduced.
5. Carrier pigeons to carry small items/letters to different people around the xyson area.

Just an extra point : The ability to use different kinds of material in recipes, different branches on the same barricade or different trees on a wall, there is no reason they should have to be the same ones, very annoying trying to find the last 3 logs (of the right type) for a wall.