NxBRE is a lightweight Business Rule Engine (aka Rule Based Engine) for the .NET platform, composed of a forward-chaining inference engine and an XML-driven flow control engine. It supports RuleML 0.9 Naf Datalog and Visio 2003 modeling.
JBound is a simple utility that performs boundary checks on domain model objects. It injects extreme values (minimum, maximum, null) in constructor arguments and setters. It also calls getters, equals, hashCode and toString.
jinFORM is a J2EE 1.4 web application that allows filling Microsoft Infopath forms. jinFORM relies on Orbeon Presentation Server (http://www.orbeon.com/) for HTML rendering, for which it transforms XSN files to XForms and acts as a submission handler.