PTGui is panoramic stitching software for Windows and Mac OSX. Originally developed as a Graphical User Interface for Panorama Tools (hence the name), PTGui now is a full featured Downloads
-PTGui can stitch multiple rows of images
-Create 360 degree cylindrical panoramas, 'flat' partial panoramas and even spherical 360x180 degree panoramas
-No need to keep the camera level: PTGui can stitch rotated and tilted images
-Virtually unlimited output size: create Gigapixel panoramas from hundreds of images!
-Layered output allows full control over the final stitched result
-PTGui stitches most panoramas fully automatically, but at the same time provides full manual control over every single parameter. This enables stitching of 'difficult' scenes, where other programs fail.
-Full 16 bit workflow for best image quality
Full List: http://www.ptgui.com/features.html
Windows or Mac OSX (not sure the versions, they gave NO info)
Version 7.8 (2 April 2008)
Fix: Checkboxes in Advanced Optimizer tab would sometimes show the wrong value
Fix: PTGui could crash occasionally
Version 7.7 (27 March 2008)
Automatic update check: PTGui can check once a week if a new version is available (configurable in Options). Upgrading is done without the need to enter a registration key.
PTGui Pro: added Exposure Fusion. The functionality is similar to Enfuse and Tufuse and built into PTGui Pro. To use exposure fusion, go to the HDR tab, enable HDR mode and choose 'Method: exposure fusing'. The Fuse Settings button generates a preview of the fused panorama and provides a way to adjust the parameters of the fusing algorithm. See the updated HDR tutorial for more information.
PTGui Pro: there is now a dedicated 64 bit version for the 64 bit editions of Windows XP and Vista.
PTGui Pro: the Preview Exposure slider in the Control Points tab can be reset to zero by right-clicking on the slider.