If your into panoramic images like I am your always on the look out for software to help you stitch images together. This is a fine choice.
Autostitch™ is the world’s first fully automatic 2D image stitcher. Capable of stitching full view panoramas without any user input whatsoever, Autostitch is a breakthrough technology for panoramic photography, VR and visualisation applications. This is the first solution to stitch any panorama completely automatically, whether 1D (horizontal) or 2D (horizontal and vertical).
Oh yeah, it’s free!