PTgui - PTGui is panoramic stitching software.
Sketch - Professional digital design for Mac.
Hugin - Hugin is an easy to use cross-platform panoramic imaging toolchain based on Panorama Tools.
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
PanoramaStudio - PanoramaStudio can create seamless 360 degree and wide angle panoramic images.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.