Open Source Scalable Vector Graphics Editor

http://www.inkscape.org/ 

Inkscape is an open source SVG editor with capabilities similar to Illustrator, CorelDraw, Visio, etc. Supported SVG features include basic shapes, paths, text, alpha blending, transforms, gradients, node editing, svg-to-png export, grouping, and more.

Inkscape's main motivation is to provide the Open Source community with a fully XML, SVG, and CSS2 compliant SVG drawing tool. Additional planned work includes conversion of the codebase from C/Gtk to C++/Gtkmm, emphasizing a lightweight core with powerful features added through an extension mechanism, and establishment of a friendly, open, community-oriented development processes.