http://www.inkscape.org/download.php
http://www.inkscape.org/

InkScape Open Source Scalable Vector Graphics Editor
Inkscape is an Open Source vector graphics editor, with capabilities similar to Illustrator, Freehand, CorelDraw, or Xara X using the W3C standard Scalable Vector Graphics (SVG) file format. Supported SVG features include shapes, paths, text, markers, clones, alpha blending, transforms, gradients, patterns, and grouping. Inkscape also supports Creative Commons meta-data, node editing, layers, complex path operations, bitmap tracing, text-on-path, flowed text, direct XML editing, and more. It imports formats such as JPEG, PNG, TIFF, and others and exports PNG as well as multiple vector-based formats.
Inkscape's main goal is to create a powerful and convenient drawing tool fully compliant with XML, SVG, and CSS standards. We also aim to maintain a thriving user and developer community by using open, community-oriented development process, and by making sure Inkcape is easy to learn, to use, and to extend. While Inkscape does not have all the features of the market leading proprietary software, the latest versions provide for a large portion of basic vector graphics editing capabilities. People report successfully using Inkscape in a lot of very different projects (web graphics, technical diagrams, icons, creative art, logos, maps). See examples at the Galleries. We try to always keep the codebase usable for real users, as we believe that a tight iteration cycle between users and developers will give best results. You can start using Inkscape alongside your other tools now!