Right Click Image Converter convert between image formats from the Windows shell.
Convert from any of these: BMP, JPEG, GIF, ICO, PNG, TGA, TIFF, WBMP, PSD, CUT, IFF, DDS, PBM, PCX, PGM, PPM, RAS, XMB, XPM
Into any of these:
JPEG, ICON, BMP, PNG, TGA, WBMP, TIFF, XPM, PBM, PGM, PPM
With this utility you can convert between image formats