Enblend blends away the seams in a panoramic image mosaic using a multi-resolution spline. Enfuse merges different exposures of the same scene to produce an image that looks much like a tone-mapped image.
MacroFusion is a neat little GUI for great tool Enfuse (command line). It makes easy fusion few photos to one with great DOF (Deep of Field) or DR (Dynamic Range). It can be useful for every macro lovers or landscapers.
ImageFuser is a MacOSX Gui for enfuse and align_image_stack that fuses multiple exposures (fotos) of one scene into an image with greater detail and well balanced exposure by using the well exposed areas of the original multi-exposure images.