• Link - OpenRules

Excel + Java + Eclipse

A combination of Excel, Eclipse, and Open Source Tools, backed by OpenRules support, forms a practical framework for full-scale Business Rules Management and rules-based Web Application Development. OpenRules embodies an ingenious software architecture that maximizes customizability and is open to any integration solution. Extensive reuse of proven, commonly available software results in a framework that matches or exceeds similar commercial systems in speed, compactness, and ease of use.

http://openrules.com/overview.htm