LegStar provides development and runtime features for developers who need to integrate with mainframe programs such as those written in COBOL.

Unlike other integration solutions available, LegStar is free and open-source. It leverages the ever-increasing power of open-source software by using familiar programming patterns (visitor, strategy…), frameworks (JAXB, JAX-WS), tools (Apache Ant, Eclipse) and targeting widely used J2EE servers such as Apache Tomcat and Jetty or Enterprise Service Buses.