PhotoDemon is described as 'Portable BSD-licensed image editor for Windows offering multi-layer support, batch processing, extensive filters, macro recording, and broad file compatibility' and is a Image Editor in the photos & graphics category. There are more than 25 alternatives to PhotoDemon for a variety of platforms, including Windows, Mac, Web-based, Linux and Flathub apps. The best PhotoDemon alternative is GIMP, which is both free and Open Source. Other great apps like PhotoDemon are Krita, Adobe Photoshop, Paint.NET and Affinity.