The following packages are known to depend on or use graphviz:

Requires
	webdot
	doxygen
	R
	ImageMagick
	anjuta

Require - but just use dot's stdin/stdout simplisticly
	perl-GraphViz
	perl-Graph-Writer-GraphViz
	perl-Graph-SocialMap
	rpmDirectoryCheck,
	k3d

BuildRequires only (doxygen, graphviz)
	libxml++
	icu
	taglib 
	koffice 
	bakery
	cppunit
	jrtplib
	libburn
	QuantLib
	rapidsvn