GIMP stands for GNU Image Manipulation Program which is an opensource image editor program supporting almost every popular image formats.

PaintTool SAI is high quality and lightweight painting software, fully digitizer support, amazing anti-aliased paintings, provide easy and stable operation.

RealWorld Paint is an easy-to-use image editor and animation editor with vectors, layers, masks and Photoshop plug-ins.

MyPaint is an easy-to-use painting program which works well with Wacom graphics tablets and other similar devices.

Zoner Photo Studio is a bitmap editor and image file manager is one of the most widely used programs for editing digital photographs.

Animation Paper is a handwritten animation software.