how to communicate with the author

To report a problem or send in some other useful comments, see e-mail address here.

NB: alas, please note that I don't currently have the time for developing new suggested features.

some hyperlinks to other computer programs

The following links point mostly to programs capable of performing some kind of symbolic computation, or to packages that (optionally or otherwise) rely on Qgraf. Some other links given further below point to webpages that provide links for other types of programs as well, including ones that perform mainly numerical calculations.

Many more links may be found in these webpages: