Factorio mods are created in the LUA programming language.
You can follow the modding tutorial on the Wiki.
After you create the mod, you should publish it to the official Factorio mods subforum.
And it's encouraged to release the source on Github!
Github also allows you host zipped releases!
FactorioMods © 2017
- Not an official Factorio app
- Source code on Github
- Factorio subreddit
- Factorio forums