It's not a real mod sadly, but if someone told me the original Fallout games were getting a Soviet spin-off, this is exactly what I'd want it to look like.
The mock-up comes courtesy of artist Alexander on DeviantArt, who previously worked on the Olympus 2207 mod for Fallout 2.
The latest images are a concept art on what a Russian-themed spin on Fallout would be. The Russians have their own power armour, and it's striking how well the setting fits.
Image: Red888guns / Deviantart
It's a shame it's not in active development, either as official DLC or even as a mod. But it's a great piece of concept art nonetheless, and it makes me long for a proper Fallout in the ideal nuclear wasteland. (It's also a good reminder that Wasteland 3 is in the works, although the vibrancy detracts from that old-school Fallout feel.)