Natural_Weather_by_Max_Tael.esp
Natural_Weather_HDR_by_Max_Tael.esp
You should only have one of these.
HDR if you are using HDR lighting, the other if you aren't.
Or better yet try http://www.tesnexus.com/downloads/file.php?id=18305.
And while we are at it:
Mart's Monster Mod - More Wilderness Life.esp [Version 3.7b3p3]
Mart's Monster Mod - More Wilderness Life No Gates.esp [Version 3.7b3p3]
Both of these? (Not sure.)
EVE_StockEquipmentReplacer for OOO.esp [Version 1.33.]
EVE_StockEquipmentReplacer4MMM.esp
Not too sure about having both of these either. Best check.
Deadly Reflex 6 - Timed Block with no damage or durability changes.esp
Deadly Reflex 6 - Timed block and 150% damage.esp
Deadly Reflex 6 - Timed Block and 250% damage.esp
I expect you should only have one of these as well.
SW01.esp
SW01Plus.esp
SW01Minus.esp
Just one of these as well.
Let There Be Darkness - Cyrodiil.esp
Let There Be Darkness - Cyrodiil + SI.esp
You should only be using the second one of these. As it includes everything in the first one.
Bottom line:
Read the instructions for all mods you install, and don't just automatically install everything included - many include optional files, some of which are of the Either/Or variety.