There lots of software for customizing image files, but most of them are not simple and user-friendly. So if you’re looking for a simple and free customizing tool for images, check this one out. ImageMagick is a tool that can convert, edit, and even help you create image files, and supports tons of image formats including jpeg, gif, png, tiff, and many more.
I have been using ImageMagick for a number of years for various tasks, both by running the tools directly from the command line, and via scripts that I use to automate image processing tasks. I have been considering writing a script that you can use to automate resizing your images for submission to the club. Please comment and let me know if you would find this useful.
Helderberg Photographic Society 
Yes – great idea!!