3D Print Toolbox

I rely heavily on this addon for my professional work, but not without some problems. It can only clean out minor errors. With large errors it will produce very unpredictable results.

Really useful, obviously you have to fix the issues yourself but the "distorted" to deal with flat faces and the button to fix non manifold edges is really useful for 3D printing.

The utility tries to pass itself off as a magic wand (and in some cases it really is), but there is too little functionality to really prepare the model efficiently and quickly.