DrJava is a lightweight programming environment for Java designed to foster test-driven software development. It includes an intelligent program editor, an interactions pane for evaluating program text, a source level debugger, and a unit testing tool.
Compile and run Java programs without using command mode!
Dude is a small simple development environment written in Java which allows you to compile and run Java programs without using the command window. It is platform independent and open source. Dude is easy to set up and uses the same directory structure for source and object files.
FUnit is the first generation xUnit testing tool to leverage the custom metadata capabilities of the Flex mxmlc compiler. The tag-based attribute model of FUnit makes it the most intuitive unit-testing framework ever created for the Flex platform.