Vector graphics is the formation of digital images through a series of commands or mathematical statements that place lines and shapes in a given two-dimensional or three-dimensional space.
Vector graphics, because they consist of points and objects rather than pixels on a grid, are free from the confines of pixel resolution. Unlike bitmapped images, they will always print at the highest dpi possible giving you printed output with smooth fills and crisp lines no matter what size you print it.
Adobe Illustrator is an illustration tool for creating and editing artwork, document layout and other vector-based drawings. The application is available on the Windows, Mac OS, Sun and SGI platforms.
Inkscape is an open source vector based graphics editor that uses SVG as its native format.
XARA X is a vector illustration package for Windows operating systems. Create effects such as transparency, bevels or gradient fills. Generate web graphics, slice images and automatically produce rollover buttons and navigation bars.