Cutting Room Floor
Skyrim modder Arthmoor managed to find some content that didn't make it into the game's release, and he has done his best to add it back into the game. He released the Cutting Room Floor mod to restore a few NPCs, some quests, and a couple locations that Bethesda had cut from the game.
While it's not a lot of content, it is cool to see that someone took the time to restore it with a mod. I am always up for more stuff to do in Skyrim, so I will be adding this to my installed mods for sure.