The codes that are available there have been contributed by ARPACK users. These include specialized drivers for unusual applications, alternate shift strategies, and in some cases minor modifications to the ARPACK source. These codes offer extended capabilities but are not part of the official release and are not supported as part of the ARPACK distribution. However, each of the included entries has undergone some degree of testing and there is a contact person listed with each code.
Users wishing to contribute software to this collection should send e-mail to email@example.com.