Inkscape - Best Free Adobe Illustrator / Corel Draw AlternativeInkscape is a freeware open source alternative to vector drawing software using Bezier curves such as Corel Draw, Xara X or Adobe Illustrator.
The default file format is SVG (scalable vector graphics), but a variety of other file extensions can be imported and exported, for example .ai (Adobe Illustrator), xaml and wmf.
Inkspace's streamlined interface makes it easy to create and edit Bezier curves. Objects can be grouped and arranged on different layers. For a full feature list, refer to http://en.wikipedia.org/wiki/Inkscape.
Inkscape is available for Windows, Linux and Mac OS X.
Inkscape is a very promising project, but the program still seems to have some stability issues.
Drawing vector graphics (shapes, polygons, spirals, text etc) in Inkspace