PaintTool SAI is a lightweight, yet high quality painting application that has stacks of features. The application has full digitizer support, including pressure sensitive functions, anti-aliased drawing and highly accurate composition with 16bit ARGB channels.
PaintTool SAI has a simple user interface that has powerful features and functions. It is easy to learn and fully supports Intel MMX Technology.
PaintTool SAI contains all the basic tools that you would expect to find in a paint program; airbrushes, paintbrushes, watercolors, pencils, and erasers. The application also lets you flip, rotate, zoom and alter the colors, saturation and hue of your images. Additionally, PaintTool SAI also has more advanced features, such as layers and canvases, which add depth to your images. PaintTool SAI also has some cools effects to play around with too.
Overall, PaintTool SAI is a great basic tool that has some good extended features. If you are looking for something that has basic functionality with some image enhancement tools, then PaintTool SAI may be just what you are looking for.