Follow along at the link as Jay build a sliding moxon vise. At the end of the instructions you can download the free woodworking plan.
This is a link to a Google 3D SketchUp drawing for a clamp vise which is very useful for small work or for holding material to be worked on a drill press. You will need the SketchUp software to download this drawing and its freely available online.
Whenever I clamp a wide panel or long board to my workbench on edge for sanding or planing, I need a way to support the other end. So I built this simple bench vise helper, as shown in the photos to the right. It is easy to make and allows me to support panels up to three feet wide.