Inkscape is a free, open-source vertor art editing program with functions similar to Adobe Illustrator. With tools that allow for editing and creation of many popular vector art formats including .pdf, .eps, .svg, and more, graphic designers are sure to appreciate this free software alternative. An added benefit is the tracing function which allows a static photo to be converted into a vectored file.
Believe it or not, most commercially available software has a FREE twin! (Or at least distant cousin!)