GIMP is one of the most popular open-source and free image editors and viewers, used by default in numerous GNU/Linux distributions. While still working on the new features of the GIMP 2.10 stable release, the development team pushed yet another development build that introduces a bunch of improvements and a highly-anticipated feature, on-canvas gradient editing. On-canvas gradient editing also makes default gradients editable, which means that when you change an existing gradient from the system folder, GIMP will duplicate it and name the copy as “Custom Gradient,” preserving it across all of your GIMP sessions. The new feature can also be used in future releases for brushes and other types of resources.