Inkscape is a free Open Source application for Windows,
Linux, & Mac OS X. That may use to edit and create vector graphics like CorelDraw,
Adobe Illustrator, and Visio. The application comes with GNU General Public
License, so you can use full version of the software for free.
It has a clear navigation & interface for easy vector
graphics editing. It features node editing, gradient, transparency, PNG export,
pattern fills, and many more. Also it supports many SVG features including
alpha blending, clones, markers, etc.