Release Notes: Numerous major bugs were fixed. Namespace support was added.
Release Notes: This release has many new features, such as assertions for test samples, recording of Web tests from your browser, new logic controls, new data visualizers, and more. There are also many bugfixes.
Release Notes: A new UI, separation of GUI and Logic code, a new Plug-in framework for new modules, enhanced performance, layering of test logic for greater flexibility, support for saving test elements, and support for distributed testing using a single client.
Release Notes: Testing objects are now modular so that JMeter can use plugins to test different types of servers (HTTP, Database, and FTP modules ship with JMeter currently). The user interface has been cleaned up and simplified. A command line and RMI Client/Server interface have been added.
Release Notes: Bugfixes, and new modules have been added. This version should be ready for use.