A collection of 3-8-3 trains that are fully filtered for basically everything I could think of, as well as "blank" stations and a unique station copier that allows you to quickly set train stations.
Despite being in development for a fifth of my lifetime, Factorio has somehow only reached version 0.17. Crikey, software development terms, eh? Whenever I've developed a game, I just make 'em up.
Add a description, image, and links to the factorio-tutorial topic page so that developers can more easily learn about it.