https://www.techradar.com/news/the-best-free-photoshop-alternative

Adobe Photoshop is the industry standard photo editing software, but it isn't the only way to give your images a new lease of life – there are plenty of free alternatives that put a huge array of powerful picture-enhancing tools at your fingertips.

Simple photo-enhancing software has its place, but a genuine Photoshop alternative needs more than just red-eye correction and a handful of retro filters; it has to offer layers and masks, batch-editing, and a wide assortment of automatic and manual editing tools. It also needs plugins to fill any gaps in its feature-set, and enable you to work as efficiently as possible.