Corbacus

Orbacus is a fully CORBA-compliant ORB that is distributed as source code. It is an ORB for CORBA enthusiasts who enjoy the access that source code availability affords to look under the hood and diagnose potential problems in their application or underlying infrastructure. Orbacus is in use in a variety of applications in end-user organizations and ISVs in the telecommunications, e-commerce, financial, defense and petroleum industries, among others. (Quelle: http://www.iona.com)