MtPaint is a free and open source image editor that is specifically designed for creating pixel art and other types of graphics. It is a versatile, easy-to-use graphics program that provides a wide range of features, including a user-friendly interface, a wide range of tools and effects, and a customizable color palette. It also supports a number of different file formats, including PNG, JPG, BMP, GIF, TIFF, XBM, and XPM. MtPaint is available for Windows, Mac OS X, and Linux operating systems. It also has a range of plugins and scripts that can be used to extend its functionality. MtPaint is a great choice for anyone who is looking for an easy to use, powerful graphics application.
The last discontinued version was released in January 2009.
Discontinued The last stable version was in 2015. See https://pinta-project.com/pintaproject/pinta/releases/1-6