UCUnit
- A C unit testing framework especially designed for small microcontroller systems is presented with documentation, download and links. [Open source, CPL]
- http://www.ucunit.org/

NekoUnit
- A unit test framework for NekoVM and the Neko language with installation and usage instructions.
- http://insideable.com/

xmlMessageTest
- A unit testing tool for XML-based message servers that allows to test without writing code. [Shareware]
- http://www.smartedgellc.com/xmlmessagetest/

HtmlUnit
- A Java unit testing framework for testing Web based applications. It does not model the http protocol, but the returned document so that the user may deal with pages, forms and tables. [Open Source, ASL]
- http://htmlunit.sourceforge.net/

JUnit, Testing Resources for Extreme Programming
- This site is dedicated to software developers using JUnit or one of the other XUnit testing frameworks. They are tools for Extreme Programming advocates.
- http://www.junit.org/

QtUnit
- A unit testing framework for c++, originally based on CppUnit 1.5. All code has been refactored and ported to exclusively use Qt 3.x as it base library. This makes it portable to all platforms supported by Qt. [Open source, GPL]
- http://www.uwyn.com/projects/qtunit/index.html

MinUnit -- a minimal unit testing framework for C
- A brief write-up of a unit testing framework for C in four lines of code.
- http://www.jera.com/techinfo/jtns/jtn002.html

cutee
- A C++ unit testing environment that makes easy to create and run tests of a library or application. [Open source]
- http://codesink.org/cutee_unit_testing.html

CppUnit
- A C++ unit testing framework. It started its life as a port of JUnit to C++ by Michael Feathers. [Open source, LGPL]
- http://sourceforge.net/projects/cppunit