What is known here as 'mousecloning' can be done with all the softwares recommended: HotKeyNet,Innerspace, Keyclone (and also Octopus, I think).

But what you have to understand regarding mouse-cloning is, that it is not like a 'synced' mouse, where every mouse-movement is cloned, but more eventbased, so that (for example) when you pressing the right-mousebutton, the position of your mouse is 'cloned' on the non active windows and a mouseclick is sent.

I mention this, because I read your post, as if you wanted to sync mousemovement and turning, and as far as I know currently there is no tool which can do this.

For solutions for the 'LOS-issue' as Moora has stated you could use something like 'interact with target' combined with activated 'click-to-move', or use other methods to turn your chars, like casting a channeld spell, or using the lens discussed here: Using an item to simulate /turn type macro command - It works!