Stable Releases
These releases are well tested and appropriate for production use.
Development Releases
These release are intended for testing and previewing new features. They may be unstable and are likely to have bugs.
Qpid is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Incubator PMC. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.