Factorio Forums

http://spacedock.info/factorio

This site has existed for a while although is currently mainly used for KSP mods, so I figured I'd give the Factorio section a little bit of publicity.

The mods are outdated, for version 12. Looks to be inactive, and if people download those mods, they probably won't work correctly at all.

Heh, did you know that there's a Factorio section on Nexus? There are like 4 horrifically outdated mods there
Just thought I'd leave this here...

I don't think it is a good idea to have alternative sites besides Mod Portal. (I think) MP is doing a good job to stop people from playing pirated Factorio by requiring each player to have an official account. The alternative sites cannot do so.