I have found recently that the pstoedit package, available in Debian, significantly enhances the value of xfig, by allowing ps/eps files to be converted to fig files for editing in xfig. This package handles many conversions to other vector formats as well.
Proposed setup.hint (pstoedit-3.42): category: Graphics requires: cygwin gs libpng12 libGraphicsMagick0 libxml2 sdesc: "Postscript and PDF files to editable vector graphics converter" ldesc: "Converts Postscript and PDF files to various editable vector graphics formats, including xfig, ai, idraw, metapost, and others." The source package also builds some development libraries, which would be put in a development package. Proposed setup.hint (pstoedit-dev-3.42): category: Graphics Libs requires: cygwin pstoedit external-source: pstoedit sdesc: "Development libraries and header files for pstoedit" ldesc: "Development libraries and header files for pstoedit" The pstoedit home page is at http://www.pstoedit.net/