Hugin is a free and open source panoramic imaging toolchain for Windows, MacOS and Linux. It is based on Panorama Tools. Using Hugin you can make great panorama or photomosaic photos by assemble a mosaic of photographs into a complete panorama. You can also correct your image exposure, vignetting and white balance, HDR, exposure fused or focus stacked and more. It is released under GPL-2.0-or-later license.