When comparing sK1 vs Xfig, the Slant community recommends sK1 for most people. In the question“What are the best vector graphics editors?” sK1 is ranked 7th while Xfig is ranked 13th. The most important reason people chose sK1 is:
sK1 tries to look and feel like Corel Draw, it has also an excellent *.cdr importer.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Corel Draw compatible
sK1 tries to look and feel like Corel Draw, it has also an excellent *.cdr importer.
Pro Cross-platform
Its written in the cross-platform WxWidgets toolkit.
Pro Open-Source
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.
Pro Mature
Very stable due mature code and minimal dependencies.
Cons
Con Looks a bit out of date
It still uses the X11/Athena widget toolkit which looks like an alien on all modern unix desktop environments.