Splus (Windows, Unix)
Demo version is available from website.
One of the most powerful, but least user-friendly, statistical packages. Implents a wide variety of methods (both basic and advanced), and has excellent graphics. Command line or menu driven, but needs some time invested in learning the syntax of more complex modelling. This software package is aimed at statisticians.
5th Floor, Network House
Telephone: 01276 339 800
Fax: 01256 339 839
Check your department's CHEST agreement before buying directly!
It's also worth mentioning R, which is very similar to Splus, but free.