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[213 users on Ohloh]
D-Bus is a message bus system, a simple way for applications to talk to one another. In addition to interprocess communication, D-Bus helps coordinate process lifecycle; it makes it simple and reliable to code a "single instance" application or daemon, and to launch applications and daemons on demand when their services are needed.
Apache ActiveMQ
[64 users on Ohloh]
Apache ActiveMQ is a fast Message Bus which supports many Cross Language Clients and Protocols and many advanced features while fully supporting JMS 1.1 and J2EE 1.4.
[16 users on Ohloh]
NServiceBus is a powerful, yet lightweight, open source messaging framework for designing distributed .NET enterprise systems.
Entirely pluggable yet simple to use, NServiceBus gives programmers a head-start on developing robust, scalable,
and maintainable service-layers and long-running business processes.
[14 users on Ohloh]
JORAM (Java Open Reliable Asynchronous Messaging) is an open source implementation of the JMS (Java Message Service) 1.1 API. It provides access to a really distributed MOM (Message Oriented Middleware), built on top of the ScalAgent D.T. agents based platform and used within many critical operational applications.

Stable versions of JORAM are JMS 1.1 certified. Moreover JORAM is used by JOnAS to undergo the J2EE 1.4 certification, and has passed all tests concerning JMS 1.1 certification ...

[2 users on Ohloh]
dbus-cxx is yet another C++ wrapper for dbus. However, it differs from the current implementations in several respects. First, it exposes the C API to allow direct manipulation. Second, it relies heavily on sigc++ to provide an OO interface.
[1 users on Ohloh]
Tags: ux extux messagebus broadcaster javascript extjs ext
A message bus allows for loose coupling components in an application for message exchanging. Components do not need to be state aware and publish/receive messages using the message bus as a broker.
[0 users on Ohloh]
PolicyKit-gnome includes GNOME specific code and tools for using PolicyKit from GTK+ applications.