Apps similar to JMG Photo Printer include Qimage Ultimate. It's paid, but RollNest is free. Other options are FitPlot. In total there are three apps like JMG Photo Printer for Mac, Windows and the web.
Qimage Ultimate is the advanced photo printing software. Also, it's good for automatic packing a large number of images into a giant "atlas" with minimal free space - for a special production printing.
FitPlot helps you to prepare a layout of images and PDFs directly on a virtual sheet, ready to print.
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RollNest is a web-based wide-format print layout tool for photographers and print professionals, designed to arrange images on roll paper efficiently and reduce paper waste.
