Momoko is a generic, object-oriented, modular, extensible environment for creating multi-user environments. It is suitable for writing MUDs, servers, and community-based Web sites. It is written in pure Java and supports Java and Python as internal scripting languages. Momoko provides facilities for organizing objects into tree-based hierarchies, orthogonal persistence, a transparent distributed objects system, remote access to source code and user files via WebDAV, a telnet-enabled shell for manipulating the object database, and an integrated build process which can be triggered remotely.
The SOAP to CORBA bridge/translator is written entirely in C++ and shows that it is indeed possible to do a generic translation of SOAP requests to CORBA method invocations and vice versa. This is implemented by using the CORBA Interface repository to match the incoming SOAP request to the corresponding CORBA service, build the dynamic invocation of the CORBA service, and generate the SOAP response (or possibly SOAP fault in the case of a CORBA user exception, for instance).
The Pandora Engine SDK is an object-oriented development toolkit that is specially designed for multi-platform use. It allows you to create truly object-oriented programs without being restricted to object-oriented languages like C++. The environment is fully self-contained, which allows for easier porting, and the inclusion of a commercially developed VESA graphics drivers means that you can create full-screen applications that don't require X11. It is intended for creating both applications and games, and is also required to write programs for Athene, a multi-platform operating system that is based on the engine.
XParam is an extensible, type-safe, non-intrusive, object-oriented tool for general-purpose object serialization and deserialization in C++, good for parsing command-line parameters and cross-program/cross-platform communication. It can handle named parameters as well as object streams. It recognizes class hierarchies, abstract interfaces, and polymorphism, and can therefore serve as a plug-in management framework (e.g., for strategy management).
The Interreality project is a collection of Open Source, Free Software projects based on the Virtual Object System (VOS) platform. The goal is to develop a free and open platform for multi-user 3D virtual reality games, applications, and interactive, collaborative 3D virtual spaces. VOS is a powerful and generic network object framework designed to support a variety of high-performance applications. It is the basis for Ter'Angreal, a general-purpose browser application for entering and participating in 3D worlds.