Simply hides sheathed weapons from your character's back/hip.
This mod replaces Skyrim's VANILLA MALE skeletons.

>>This mod contains nif-files, so backup your current skeleton files before overwriting them with these!<<
BACKUP folder contains unmodified files for VANILLA skeletons.

Same mod, but for female characters:
http://www.nexusmods.com/skyrim/mods/48469/?