A major update to the GNU Image Manipulation Program (GIMP), widely regarded as the leading free software raster image editing program, is scheduled for this month. The 2.4 release is expected to include a number of new features and enhancements to existing features.
If you'd like to get a look at the new features before the release, you can download the development version, and be sure to read the release notes for 2.3 for new features and known issues.
The first thing most users will notice about 2.4 is the addition of three new tools to the palette: the Align tool, the Foreground Extraction tool, and a new "Simple" Rectangle Selector. The Align tool lets you vertically and horizontally align image layers -- a task you had to perform manually before. You can align an image to any edge or the center, specify an offset in any direction, and adjust vertical and horizontal alignment separately.