http://jaxodraw.sourceforge.net/
"JaxoDraw is a Java program for drawing Feynman diagrams. It has a complete graphical user interface that allows to carry out all actions in a mouse click-and-drag fashion. the main feature of JaxoDraw is the possibility of generating LaTeX code."
"JaxoDraw is a Java program for drawing Feynman diagrams. It has a complete graphical user interface that allows to carry out all actions in a mouse click-and-drag fashion. the main feature of JaxoDraw is the possibility of generating LaTeX code."