EJOE is a lightweight Java remoting framework built to send and receive objects through pluggable (de)serialization mechanisms. It offers a high-performance, simple, and clean object request broker (whereby ORB is meant in its natural manner and not in its relation with CORBA), with server and client components for your client/server applications. It's a highly scalable implementation of the common request-process-response pattern based on Java NIO. It does support optional remote class loading to avoid redundant classpath entries, but doesn't require stubs and/or proxy objects.
elemenope is an Enterprise Application Integration, Service Oriented Architecture, and general messaging framework. It provides the capability for massive decoupling of an enterprise's components through standardized interfaces for communications. It provides complete abstraction of both transmission protocol and functional components. A project may connect components via a particular protocol standard, and completely change the protocol technology deployed with a simple change to a configuration file, i.e. no code changes. It implements the following connector sets: JMS, SOAP, XML-RPC, direct call, and native IBM MQSeries. It allows an organization to easily create a large scale multi-platform application to conduct messaging or transaction processing. It simplifies architecture of large systems by standardizing functional components and message pathways.
libt2n is a C++ library for inter-process communication (IPC) or remote procedure-calls (RPC). It comes with an additional code generator (libt2n-codegen) to generate stubs and skeletons. The focus lies on a minimum of code lines needed to export and use methods, and being able to use complex C++ structures like maps of vectors.
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.
Channel is a C++ template framework for distributed message passing and event dispatching. Its major components (message IDs, routing algorithms...) are highly configurable as template parameters. As a namespace shared by peer threads, channels support publish/subscribe scope control, message filtering, and translation.