Photosynth is an entirely new visual medium. Photosynth analyzes a set of photos of a place or an object for similarities each other, and uses that data to estimate where a photo was taken and build a model of the subject. It then re-creates the environment and uses that as a canvas on which to display the photos. Photosynth is available for free at photosynth.com, where you can explore creations from users around the world and build synths of your own.
Recent advances in camera and sensor technology and software for stitching images together has led to the creation of images containing billions of pixels (gigapixels). HD View is a new viewer developed by Microsoft Research's Interactive Visual Media group to aid in the display and interaction with very large images.
Image Composite Editor
Microsoft Image Composite Editor is an advanced panoramic image stitcher. The application takes a set of overlapping photographs of a scene shot from a single camera location and creates a high-resolution panorama incorporating all the source images at full resolution. The stitched panorama can be saved in a wide variety of formats, from common formats like JPEG and TIFF to multi-resolution tiled formats like HD View and Silverlight Deep Zoom.