If you feel at home in Photoshop, but need an open source alternative - Gimpshop is the way to go. Gimpshop Available for: windows mac linux unix java One of the major differences from Gimp is that CinePaint. Started as a fork of the Gimp project, the goal is to create a more professional graphical editing application aimed at the movie industry. Read moreĬinePaint 0.23 Available for: windows mac linux unix java Probably the oldest and most well-known open source graphic application - GNU Image Manipulation Program or Gimp was started in 1995 and has since then grown to the status it has today. Gimp 2.6 Available for: windows mac linux unix java Krita is open source bitmap editing and drawing with the following advanced features: 16-bit image support, High dynamic resolution images, CMYK and even color management. Krita 1.6.1 Available for: windows mac linux unix java Please note that Paint.NET used to be open source, but is now only freeware. On top of that is has many filters that handles everything from blurring/sharpening to color control. However, it packs features like any commercial program such as: layers, bezier/spline curve drawing and unlimited undo history. One of the main goals of the project is to provide a simple and easy to use application with an intuitive user interface. Paint.NET is a bitmap drawing and editing application. Bitmap-editing retouching bitmap graphics Download Paint.NET