http://www.liafa.jussieu.fr/~gastin/JasTEX/JasTEX.html

JasTEX is a Graphical User Interface written in Java for GasTEX. JasTEX is a free open source program under GNU/GPL licence. It has been developped by 3 graduate students at the University of Paris 7: (Michel DUONG - Gregory KOKANOSKY - Yannick OZOUF)

GasTEX is a set of LATEX macros which allow to draw very easily graphs, automata, nets, diagrams, etc… under the picture environment of LATEX. A picture with gastex basically consists of nodes and edges.