Parlog

Parlog for Windows is an implementation of the concurrent logic programming language Parlog running under Windows 3.1, 95, 98, NT, 2000, and XP. It is available free of charge for non-commercial use. No support is offered for this product.

Software as a self-extracting zip file.
User's Guide in PDF format.

The software is compatible with the tutorial book Programming in Parlog by Tom Conlon, published by Addison-Wesley. This book is out of print but can be obtained by mail from PLP for only £10 (or equivalent) plus postage. You can order a copy online:

One copy of Programming in Parlog,
including 1st-class postage in UK or airmail postage within Europe: £13.00

One copy of Programming in Parlog,
including airmail postage outside Europe: £17.00