We have access to Adobe PhotoShop but understand that not every organization is able to purchase photo editing software. If you can, we recommend it. If not, here is a list of free photo editing tools. Note: we haven't tried them all and can't guarantee their features or that they're all currently available for free: 

• Preview (Mac only)
• Photopea
• BeFunky
• Fotor
• Pixlr
• PicMonkey
• Croppola