PencilSheep is a very powerful and at the same time completely free graphics file editor, which, unlike other such tools, uses the GPU completely while working. This program contains all the necessary tools needed to edit photos, images or any other graphic files. PencilSheep offers the ability to work on layers, use filters, use a brush (e.g.

to remove imperfections), and allows you to reuse the "undo" and "repeat" functions, thanks to which you can test various graphic effects entered on files. PencilSheep is designed from the ground up to take full advantage of the GPU when editing images and making various corrections or changes. This is the opposite of other graphics tools, which either only partially or not at all use the GPU.

Thanks to this feature, various operations are performed faster than in other editors. For many advanced users looking for an alternative to commercial graphics software, PencilSheep supports graphics tablets, giving them much more room to manoeuvre when editing photos than a regular computer mouse.