Hi all! Lately I've been trying to tackle Blender's python and here are early fruits of my experiments. This addon fixes rotation of objects such as meshes or armatures to match Unity's coordinate system. To install this addon unpack it to your Blender addon folder, e.g. "C:\Program Files\Blender Foundation\Blender\2.67\scripts\addons" or use install from file button in user preferences under addons tab. After installing, addon is in Object category and after enabling it, can be accessed from Tool Shelf under "Unity Tools" panel. Note that complete rotation fix on X and Z axis will swap object so it will face +Y axis instead -Y, if you export through fbx remember to set Forward Z and Up Y as export axis when you use full rotation fix. Hope it will prove useful for someone. Cheers!