this mod adds a Replicator, a device similar to the Autocrafter from Pipeworks. (Actually, its code is based on it.)
Just as the Autocrafter, the Replicator will use the world's recipes to automatically craft items. However, while the Autocrafter needs to be told the exact recipe, the Replicator just has to know what you want it to craft. It will then try all existing recipes to build the requested item.

Usage and complete documentation: https://github.com/redyeti/minetest-replicator/blob/master/README.md
Dependencies: Pipeworks, Mesecons
License: WTFPL (applies to all parts)
Download: https://github.com/redyeti/minetest-replicator/archive/master.zip
...or browse the code: https://github.com/redyeti/minetest-replicator
Install: Download and unzip the above file, rename minetest-replicator-master to just "replicator" and move it into Minetest's mods directory.