WxCLIPS can be found here

wxCLIPS was started in 1992 by Julian Smart at the Artificial Intelligence Applications Institute, part of the University of Edinburgh. wxCLIPS is a spin-off from two projects, wxWidgets and Hardy. wxWidgets provides the underlying portable GUI layer, and the meta-CASE tool Hardy required an embedded language capable of being used to program GUIs: hence wxCLIPS.

Julian is now a freelance consultant, but continues to maintain wxCLIPS as a background task.

Hardy information, documentation, distributions, the SDK and examples are available here.

Hardy uses the wxWindows cross-platform GUI building toolkit. A project originated by Julian Smart at AIAI.