AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
PixBuilder - Free Photo Editing Software for PC
Percolator - Percolator: the always fun, supremely unique photo app that is sure to surprise you! FEATURES:
showFoto - ShowFoto is the standalone image editor of the digiKam project.
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.
Fotografix - In addition to being totally portable, Fotografix has a ridiculously small footprint.