A very simple to use and understand program that is free to download is IrfanView it has simple resizing options, it will automatically correct the photo's colour / brightness / contrast with a click of the mouse. You can crop the image by clicking and dragging a window around what you want and then cropping it to the window you have drawn. I've used the program for years and its a brilliant, simple program to use. http://www.irfanview.com/
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