PhotoSpills - Easy to use PC collage software with unlimited design possibilities.
AndreaMosaic - With AndreaMosaic you can create your own photographic mosaics made with your own pictures.
ShapeX - Shape Collage generator - Photos & Graphics
WidsMob Montage - Make stunning mosaic photos or montage shape with tiles, which supports both JPEG and PNG files.
PhotoCollage - PhotoCollage allows you to create photo collage posters from a list of photographs.
Mosaic Creator - Mosaic Creator is professional mosaic tool. You can create your own picture mosaic.