Evan's Image Editor

Evan's Image Editor (EIE) is a free image editor that allows for the editing and creation of animated or still images.

It contains several GPU-powered image modifiers that take advantage of modern graphics hardware, giving you an instant preview of the effect while you adjust parameters. It also has a non-binary selection system, allowing you to "partially select" pixels and apply drawing tool and modification actions that perform weighted averages based on the selection value.