I have used photoshop forever to take the saved scans of coins and create new files where the front and back of the coin are in the same file. My computer with Photoshop crashed the other day and my copy of Photoshop is no longer compatible with my other computer so I can't install it. Does anyone know of another free software program or website where I can open multiple photos at a time and combine photos into new files? I tried the website PicMonkey but I can't see a way to open more than one photo at a time.
Not free, but Photoshop Elements is a bargain at 75 bucks or so. For free, I don't think paint.net can be beat.
Not free, but you might want to check out Adobe Creative Cloud for photographers. You get both Lightroom and Photoshop for $9.99 a month. It downloads local copies of both apps, and you always have the latest and greatest versions. It downloads all updates automatically. https://creative.adobe.com/plans
I don't use it enough to justify a subscription. I tried Photoscape and I think that should work for me.