DDGEXplorer.jar contains its source code within the jar file.

prefuse.jar contains its source code within the jar file.

Source code to the freehep packages is available at https://github.com/freehep

Source code for gson-2.6.2.jar is available at https://github.com/google/gson

Source code for jdiff.jar is available at https://sourceforge.net/p/javadiff/code/
