Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
SVGO - Tool for optimizing SVG files
SVGminify.com - Removes superfluous information reducing the size of SVG files
Scour - SVG Optimizer / Cleaner
AutoDraw - A Google Experiment that helps you draw with relevant suggestions.
SmoothDraw - SmoothDraw is an easy natural painting and digital free-hand drawing software that can produce high...