Microsoft Image Composite Editor that is very simple to use and it FREE. Microsoft Image Composite Editor is an advanced panoramic image stitcher. Given a set of overlapping photographs of a scene shot from a single camera location, the application creates a high-resolution panorama that seamlessly combines the original images.
Download at http://research.microsoft.com/en-us/um/redmond/groups/ivm/ice/
©2010 Microsoft Corporation. All rights reserved.