#5 Enhanced Night Skyrim
Download it here.
The environment may look pretty, but what about the skies? Funny you should mention that, because CptJoker71 has just the mod to make the skies every bit as vibrant as the previous mods.
Enhanced Night Skyrim replaces the drab looking night sky with a much more detailed one, and it comes in multiple versions—in color, and monochrome. Best of all, it doesn't conflict with the game's built-in constellations.