Delphinus is an image processing software armored with many powerful filtering algorithms. It supports many popular file formats, including FIT, BMP, JPEG, TGA, PPM, TIFF, PNG, PCX, RAS, HIPS, ICO, CUR, MNG, JPEG 2000, WMF, EMF,GIF, EPS file formats.

I have noticed that Delphinus allows you to control your camera exposure time. This feature is rare, considering it is free. It can access your camera through RS-232 (serial) and LPT (parallel) port. Moreover, you can edit DSLR files with file converter for RAW, CRW and CR2 files, straight from the software. If you are just editing 16 bit images and can’t afford heavy and expensive software, then you can consider this.