Art Department Pro (copies should be pretty darn cheap these days)
+1
AdPro is very powerful image tool, especially for the day.
Back in the day I used this program professionally. You could use for scaling, transcoding we would commonly move between TIFF, Amiga IFF, Targa, and JPG. Also would use it for color correcting digitized cell animation frames so they would look better on NTSC.
I miss my television production days.... Viva Amiga......
