PTgui - PTGui is panoramic stitching software.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Hugin - Hugin is an easy to use cross-platform panoramic imaging toolchain based on Panorama Tools.
Darktable - darktable is an open source photography workflow application and raw developer.
PanoramaStudio - PanoramaStudio can create seamless 360 degree and wide angle panoramic images.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.