Amzi! Prolog+Logic Server, Adventure in Prolog tutorial, Expert Systems in Prolog, Freeware, Articles, Source Code, Consulting
This extensible Prolog version runs under Windows, Linux, Solaris and HP/UX, supporting development of client and server applications embeddable in the web, C/C++, Java, Delphi, Visual Basic and other environments. An IDE is available for Windows along with an interpreter-based tutorial.