Inkscape

Inkscape is cross-platform vector graphics editor application. It is distributed under a free software license, runs on Mac OS X, Unix-like operating systems and Microsoft Windows. Inkscape's implementation of SVG and CSS standards is incomplete.Most notably, it does not yet support animation, or SVG fonts, though base support for the creation of SVG fonts has been implemented as of version 0.47. Inkscape has multi-lingual support, particularly for complex scripts, something currently lacking in most commercial vector graphics applications.

An Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format. Inkscape supports many advanced SVG features (markers, clones, alpha blending, etc.) and great care is taken in designing a streamlined interface. It is very easy to edit nodes, perform complex path operations, trace bitmaps and much more.

Inkscape screenshoot
making vector graphic in inkscape