GNU Paint

GNU Paint, otherwise known as Gpaint, is a free and open-source raster graphics editor similar to Microsoft Paint. It is free software under the terms of the GPL-3.0-or-later license and is part of the GNU Project.

Overview
Features of gpaint include:
 * Drawing tools such as ovals, freehand, polygon and text, with fill or shadow for polygons and closed freehand shapes.
 * Cut and paste by selecting irregular regions or polygons.
 * Preliminary print support using gnome-print.
 * Modern, easy-to-use user interface with tool and color palettes.
 * Multiple-image editing in a single instance of the program.
 * All the image processing features present in xpaint.
 * No facility to crop images
 * No ability to make rectangular selections
 * NB No undo feature