The two photos I took of the polar bear at the zoo were through glass.
Ziggy suggested playing with them to remove the blue tint, which I think is a good idea.
However, I tend to only use my PSP to crop, resize, and add my name to my photos.
Occasionally to sharpen, to touch-up a spot, or to add a true watermark.
I use it with graphics as well, to make layers with my 3D images.
I don't use it to adjust the photos themselevs though.
I'd love to see how you all might change the images to clear out the blue tint,
and to hear how you did it, and which program you use for it.