T2 is a powerful automated unit testing tool for Java, featuring:

• Powerful trace-based testing.
• Choose between random based generation, search-mode, or combinatoric.
• Fast (injecting thousands of tests per second).
• Write your specs in plain Java!
• Support model-based testing.
• Support regression.
• Naturally integrate with Junit and IDEs.

T2 is FREE under GPL license.

Here are some screenshots. Read more in T2 home page.

Download: see the right bar.

Installation: it's a jar file; just place it somewhere and include it in your class path to use it. Can't be easier than that :)

Using it with JUnit:

• See the JUnit+T2 tutorial here.

Using it from IDE: (best choice, now you can have a great combo like Eclipse+Junit+Emma+T2!)

• See examples in T2 home page.
• See user manual.

Using it stand-alone:

• See some examples here.
• See user manual.

Source: if you must look at the source, you can check it out from this cs.uu subversion repository (oh, the repository has been moved to a new server):

• https://subversion.cs.uu.nl/repos/staff.wishnu.T2framework

Contact: Wishnu Prasetya, owner and head developer.