PTgui - PTGui is panoramic stitching software.
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
Hugin - Hugin is an easy to use cross-platform panoramic imaging toolchain based on Panorama Tools.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
PanoramaStudio - PanoramaStudio can create seamless 360 degree and wide angle panoramic images.
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.