Diffractor is described as 'unifies managing photo, video and audio files. If you centralize media on that trusty old PC; let Diffractor do the heavy lifting' and is a Photo Manager in the Photos & Graphics category. There are more than 50 alternatives to Diffractor for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is IrfanView. It's not free, so if you're looking for a free alternative, you could try JPEGView or Photoscape. Other great apps like Diffractor are XnView MP (Free Personal), FastStone Image Viewer (Free Personal), Adobe Lightroom (Paid) and XnView (Free Personal).
FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. It has a nice array of features that include image viewing, management, comparison, red-eye removal, emailing, resizing, cropping and color adjustments.
From high-precision light and color tools, to advanced clarity and dehaze settings, to the ability to create and save your own filters. Polarr is the ideal photo editor for bloggers, students, and photo professionals alike.