A professional vector graphics editor written in WxWidgets.
Ranked in these QuestionsQuestion Ranking
Pro Corel Draw compatible
sK1 tries to look and feel like Corel Draw, it has also an excellent *.cdr importer.
Its written in the cross-platform WxWidgets toolkit.
Released under the GNU Lesser General Public License.
Pro CMYK colorspace support
CMYK support is one of its main features.
Pro Under GNU LGPL
So you don't have to fear the harsh copyleft of the GNU GPL license.