libgraphviz3-dev 2.12-5ubuntu2 (amd64 binary) in ubuntu hardy

 Graphviz is a set of graph drawing tools. See the description of the graphviz
 package for a full description.
 .
 This package installs the libraries and headers necessary to link graphviz
 library routines into an application. It also installs additional man pages.
 .
 This package also contains the OCaml development files.
 .
 Note: A graphviz user doesn't need to install this package.