Desktop productivity tool No. 6: Inkscape 0.48
Free software's answer to Adobe Illustrator, Inkscape is polished, powerful, and loaded with tools that don't require a lot of guesswork to use well. Its native file format is conventional XML, and it can import and export from a whole bevy of existing vector and raster formats, as well as PDFs. The most recent version, 0.48, adds multipath editing, improved text handling, an interesting "spray" tool, and broad support for ICC color throughout the program.