igraph sugiyama graph layout algorithm in C
to compile:
./autogen.sh
./configure
make
cd src
./sugi
This is the sugiyama graph algrotithm from igraph library in C with brandes and kopf horizontal placement algorithm
This has a initial gtk+ gui
The main.c program does a graph layout as test.
The problem with newer igrph library is that it is turned in c++ source and needs c++ compiler.