Inkscape for MacOS X v1.0

Inkscape is 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.

SVG is an open, industry-standard XML-based format for vector graphics developed by the W3C. Most vector editors these days can import and export SVG, and modern browsers (such as Firefox and Opera) can display it directly, i.e. without requiring any plugins.