Storyboard planning software: Frame Forge
Allows to programme inbuilt human figures and plant camera angles to plan shot. Such storyboard is useful in the event of filming in one location that spreads over many scenes and where shots in each scene requiries a different angle. Pre-prepared visual frames can help to avoid any confusion that may arise.
Can even export images out as quicktime movie to have a video based storyboard.
Must pay to use features in full. Demo version may good enough to create simple visual frames though.
Storyboard planning freeware: Celtx