Softwired iBus
Offers Java messaging support for the wireless and wired world; includes support FAQ, product and company news, with customer and partner lists.

FioranoMQ
A JMS compliant platform. FioranoMQ Info Bus is a serverless pub/sub API. FioranoMQ Bridge allows JMS applications to seamlessly interoperate with MSMQ and IBM MQSeries systems. JMS++ TestSuite tests conformance of JMS implementations.

Java Message Service API
Sun's official JMS site includes documentation, FAQs and a JMS vendor list.

SwiftMQ
Standalone JMS enterprise messaging system. Fully implements both the point-to-point as well as the publish/subscribe message model. [Commercial]

JORAM
ObjectWeb's implementation of Sun's JMS API specification. Integrated in JOnAS EJB Server. [Open source, LGPL]

SonicMQ
JMS compliant Java Messaging Server that supports asynchronous messaging, guaranteed message delivery, security, transaction capabilities, and XML messages.

SpiritSoft
Provides JMS-based enterprise messaging services. Includes white papers, news, and product information.

cyJNDI - cyJMS
A Free Java JNDI directory and JMS messaging server supporting SSL/TLS secured connections. [Restricted Freeware]

LJMS
Lightweight message broker for JVM-JVM communication (P2P) where performance is an issue or RMI is not available. Includes mailing list, project documentation, and CVS repository. [Open Source, GPL]

jtom
A message oriented middleware (MOM) for mobile devices to communicate with server-systems.

OpenFusion Java Message Service
Provides download, white paper, datasheet and Flash demo.

Borland VisiMessage FAQ
VisiMessage is Borland's JMS implementation and part of the Borland App Server.

MessageQ.com/JMS
News and analysis about JMS.

metaQueue.NET Messaging
A J2EE compliant package set unified messaging web service using established open standards and transports such as XML and SOAP over HTTP, HTTPS, FTP, or SMTP.

IBM WebSphere MQ Everyplace
Connects mobile and wireless applications with the enterprise using secure and dependable messaging middleware. It supports JMS, J2ME and connects with WebSphere MQ (MQSeries).

NFC Chat Server
A framework written in Java. News, screenshots, downloads, documentation, FAQ. [Open source, LGPL]

Arjuna Message Service
A complete implementation of JMS 1.1 specification. It provides advanced security, scalability and management features demanded by serious enterprise deployments. Certified J2EE compliant with HP-AS.

JMS CTS - The JMS Compliance Test Suite
A test harness for exercising JMS implementations to simplify evaluation, determine the level of compliance with the specification and help identify bugs in implementations. Overview, news, status, test cases, requirements, project information.

OpenJMS
An open-source implementation of the JMS specification that can use JDBC or RMI internally. [GPL]

Mom4j
A pure Java implementation of the JMS (Java Message Service) specification. [Open source, LGPL]

IBM WebSphere MQ
Integrated in IBM WebSphere Application Server Java Messaging Support (JMS).

Sun Java System Message Queue
An implementation of the Java Message Service (JMS) specification. [Free and commercial versions]

MantaRay
A serverless messaging fabric, based on peer-2-peer technology, 100% pure Java, supports JMS1.1 and 1.0.2, and integrates with WebLogic and WebSphere. It provides guaranteed message delivery, security, and supports transactions. [Open source, GPL]

JMS Messaging
A online resource for the latest information on JMS messaging, middleware, and other messaging news. Includes JMS tutorials, JMS open source projects, a listing of JMS products and services.

elemenope
A JMS messaging framework written in Java. It allows one to easily create a large scale multi-platform messaging or transaction processing application. [Open source, GPL]

ActiveMQ
A complete message broker and full JMS 1.1 provider featuring clustering, distributed destinations and XA support with pluggable persistence (JDBC, BDB, JDBM) and transport layers (TCP, UDP, multicast, NIO, SSL, Zeroconf, JXTA, JGroups). [Open source, Apache 2.0 license]