Inkscape is an open source SVG graphics editor released under GNU General Public License. Inkscape supports many advanced SVG features and great care is taken in designing a streamlined interface. Here are some useful tutorials for creating amazing vector graphics using Inkscape. Also see beautiful wallpapers made using Inkscape.
Thanks to InkscapeTutorials blog. Link to each of the tutorial above is provided below respective images. Hope you had a good time browsing through those awesome tutorials. If you liked them, may be you should check out these awesome GIMP tutorials also.