SimCity modder Oppie has released the first ever custom building for SimCity 2013 – a McDonalds restaurant. It was created to test the capabilities of his yet-to-be-released SimCity modding tools.
This building will grow organically in low density, medium wealth zones. Be aware that the McDonalds restaurant replaces an existing building, so the mod isn’t really adding a new building so much as redesigning an existing one.
Grab the file from the Simtropolis Exchange.