Jaxcent
- Jaxcent can be used to unit test Web Applications by automating the Internet Explorer. Unit testing samples using JUnit are provided. [Commercial, trial version]
- http://www.jaxcent.com/

STclass
- A unit testing framework comparable to JUnit, but based on runtime evaluable contracts. It implements contract based class level unit testing; inheritance of contracts and tests is handled. [Open source, LGPL]
- http://www-valoria.univ-ubs.fr/stclass/

FloSoft Systems
- Makers of Java development tools offering a Unit testing framework and a mock object tool.
- http://www.flosoft-systems.com/

MockMaker
- A program for creating source code for mock object classes. MockObjects can then be used to help writing automated unit tests using JUnit. [Open Source, MIT license]
- http://mockmaker.sourceforge.net/

JUnitPerf
- A collection of JUnit test decorators used to measure performance and scalability. Intended to be used in situations where performance and/or scalability requirements are to be kept in check while refactoring code. [Open Source, BSD License]
- http://www.clarkware.com/software/JUnitPerf.html

Surrogate - Surrogate
- A complimentary unit testing framework, especially suitable for unit testing of large, complex Java systems. The framework integrates seamlessly with JUnit, MockEJB and various mock object implementations. [Open Source]
- http://surrogate.sourceforge.net/

JTestCase
- A framework which helps in separating test data from JUnit test code by loading data from XML files. It's recommended to use in JUnit test framework or JProbe. [Open Source, Common Public License]
- http://jtestcase.sourceforge.net/

Pisces
- An extension to JUnit for distributed testing environments. Gives developers and testers the ability to create complex test suites that may be composed of remote unit tests running in parallel or serially. [Open Source, GPL]
- http://sourceforge.net/projects/pisces/

WOUnitTest
- A framework for unit testing WebObjects applications based on JUnit. WOUTRunner is a Cocoa application for running JUnit tests of WebObjects projects. It is based on the WOUnitTest framework. [Open Source, BSD License]
- http://wounittest.sourceforge.net/

JUnitX
- Test framework which extends JUnit, allowing to test private and protected Java classes, methods and variables, with GUI.
- http://www.extreme-java.de/junitx/

Junitour
- Extension to Junit make "Unimplemented" or "Still Incomplete" tests labeled differently, for later development. [Open Source, ASL]
- http://junitour.sourceforge.net/

TagUnit
- Allows unit testing of JSP custom tags within their special environment. The contents and side effects (attributes, cookies) of a custom tag are checked with assertions. [Open Source, BSD license]
- http://tagunit.sourceforge.net/

JUnit
- A unit testing framework which is a central element of the Extreme Programming (XP) testing practice. The site also features information about other unit testing frameworks. [Open Source, IBM Public License]
- http://www.junit.org/

Dbunit
- A JUnit extension that puts a database into a known state between test runs. It can export and import a database (or parts) to and from XML datasets. [Open Source, LGPL]
- http://dbunit.sourceforge.net/

Cactus
- A JUnit based test framework for integration unit testing of server-side Java code (Servlets, EJBs, Tag Libs, Filters). Test runners integrate with Jetty, Eclipse, Ant or a Browser. Cactus tests are supported amongst others by JUnitEE, JBuilder and Togeth
- http://jakarta.apache.org/cactus/