Inkscape is multipurpose full functional drawing tool. It is the best and free drawing too for vector graphic you can design , drawing and shape for SVG formatted files .You can draw any image and can save in SVG ( Salable Vector Graphics) . Main advantage of SVG file of image is you can re size the image without loosing the quality.
Following are the main advantages of Inkscape.
Flexible drawing tools
Broad file format compatibility
Powerful text tool
Bezier and spiro curves