A free, open-source professional image editor with advanced masking, layers, and plugin support.
Legacy software does not receive updates. Any security vulnerabilities discovered in Photoshop CS5 over the last decade remain unpatched, leaving your computer vulnerable to exploits if you open maliciously crafted image files. Safe and Modern Alternatives to Legacy Photoshop
Many users prefer the interface prior to the massive changes brought by Creative Cloud. Safety Warning regarding "Exclusive" Downloads