cSwing is an advanced video swing analysis program for keen golfers and golf professionals. It captures video from your camera to your PC. You can easily analyze your swing with its powerful drawing and comparison tools.
This screenshot shows that you can get a clear picture of the club at impact using a DV camcorder and capture it with cSwing. The image shows Murray Van Gundy using a 7 iron.
Using the drawing tools you can see how much the head and body move on the takeaway. Murray's head hasn't moved much from address. This is the top of his backswing with a 9-iron.
You can compare two or more golfers at one time and configure the swing windows in many different ways
to suit your needs. You can scroll the swings in all the open windows at once by rolling the mouse wheel. This image illustrates the difference
at top of the backswing between J.P. and Murray. 
The full screen mode allows you to concentrate on the swing while providing access to the most commonly used tools. This picture shows the position at impact for 2002 PGA Champion Rich Beem who, at 5' 8", is able to drive the ball 300+ yards.

A trial version of cSwing is available.