Inkscape
Inkscape is professional quality vector graphics software which runs on Linux, Mac OS X and Windows desktop computers.
- Snippet from Wikipedia: Inkscape
Inkscape is a vector graphics editor. It is used for both artistic and technical illustrations such as cartoons, clip art, logos, typography, diagrams, and flowcharts. It uses vector graphics to allow for sharp printouts and renderings at unlimited resolution and is not bound to a fixed number of pixels like raster graphics. It is free and open-source software released under a GNU General Public License (GPL) 2.0 or later.
Inkscape uses a file format defined by a technical standard named Scalable Vector Graphics (SVG) as its main format, which is supported by many other applications including web browsers. It can import and export various file formats, including Adobe Illustrator (AI), Encapsulated PostScript (EPS), PDF, PostScript (PS) and PNG.
Inkscape can render primitive vector shapes (e.g. rectangles, ellipses, polygons, arcs, spirals, stars and 3D boxes) and text. These objects may be filled with solid colors, patterns, and radial or linear color gradients, and their borders may be stroked, both with adjustable transparency. Embedding and optional tracing of raster graphics is also supported, enabling the editor to create vector graphics from photos and other raster sources. Created shapes can be further manipulated with geometric transformations, such as moving, rotating, scaling, and skewing.