Here’s a list free photo organizing software for Windows and Mac that will help you organize your collection of images and make their searching easier. If you are an ordinary photographer with a limited budget who is searching for an effective picture manager and even free photo editor, you can check out some free photo management software that I’ve already tested. But if a user wants to 'zoom in' and compare files contained in these folders, Meld gives you the ability to do so and launch file comparisons between files contained in different folders or in the same folder. Meld allows users to compare two or three different folders for differences.
FastStone Image Viewer - Metadata editing.
