Wikipedia
CleVR
CleVR is a free panoramic photo sharing site and photo stitching software. It allows panoramas to be embedded into other web pages using a Flash viewer. Panoramas can be displayed with hotspots — areas in the scene that can be clicked to display other content or to navigate to another scene. This functionality is similar to that provided by Apple's QuickTime VR, but it allows images, text and Flash Video ( FLV) video to be displayed within the panorama window.