Quote:
Does anyone know of a good free program that adjusts white balance in photos like these?

You could have a peek around for plug-ins that adjust white balance.

These days, once you've settled on a favorite photo editing app, the real power is in the plug-ins you choose. I was on Paint Shop Pro version 5 for years, and only moved to version 10 recently on a whim.

There's probably a way to mathematically deduce the correct R, G, and B value adjustments to do a white balance. Just eydropper sample a spot on the photo that's supposed to be neutral gray or white, and then figure it out from there. Only I tried that once and couldn't make it work, I must have been doing the math wrong.
_________________________
Tony Fabris