GIMP 3.0 is a significant upgrade to the open-source image editor, offering improvements to text manipulation, Wayland support, non-destructive editing, and multiple layer selection. It's a strong competitor to Photoshop.
Pinta is a free, open source program for drawing and image editing, designed to provide a simple yet powerful way to draw and manipulate images on Linux, Mac, Windows, and BSD. It offers easy drawing tools, adjustments and effects, multilingual support, a full history feature, multiple layers, and customizable workspace. The website also provides resources for download, documentation, reporting bugs, making suggestions, asking questions, discussing Pinta, contributing, and contact.