I took several photos of a drawing that a friend had made, but the quality of the photos is not very good, so I need software that can produce enhanced images by combining a stack of images of the same scene that were taken during a short period of time.
I would try hugin, manually do it in gimp, maayyybe an imagej plugin could do it, or whip up some octave or python code to do it. also, If you upload the photos somewhere im sure someone would be willing to take a crack at it.
Note, I think you will probably need to do lens calibration, alignment, then stacking.