Hoffbauer

" The GOBLIN project consists of a C++ class library for a large series of graph optimization problems, GOSH, an extension of the Tcl/Tk scripting language to graph objects, and GOBLET, a graphical user interface to the library functions. GOBLET includes a graph editor and some graph layout methods. License: GNU Lesser General Public License (LGPL) Changes:
A method for visibility drawings and a class for directed dual graphs has been added. Some data structures have been revised in order to draw nodes as boxes and circles of different size. The file interface now explicitly saves information about edge colourings, exterior faces of planar embeddings, and the used layout model."