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Vector Based

Listings
Creative Docs.net is a vector-based graphic design tool, ideal to quickly write documents, manuals, posters, illustrations, schemas, plans, flow charts, etc.
http://www.creativedocs.net/
Vector drawing software application for Mac.
http://www.eazydraw.com/
An open source vector graphics editor, with capabilities similar to illustrator, CorelDraw, or Xara X, using the W3C standard ScalableVector Graphics (SVG) file format.
http://www.inkscape.org/
Mayura Draw is a vector-based drawing program.
http://www.mayura.com/