Jurtle

From Otherwise:

Jurtle is an integrated programming environment designed for people who want to learn programming using the Java language. It provides a simple yet powerful programming editor coupled with built-in facilities for compiling and running your programs. Unlike most other development environments, no complex configuration is needed in order to use Jurtle. Install it and immediately start running the examples and learning to write them youself.

1. You can now use Jurtle to program the Lego MindStorms Robotic system. After installing the LeJOS operating system on the RCX brick, you can program the brick using Java. Jurtle will automatically use the special LeJOS compiler and then download your compiled programs to the RCX for running. This new vesion has also added a "Copy Picture to Clipboard" button to the Display pane. This allows you to easily capture to output of your creation and paste it into a drawing program or other application, added two new Preferences tabs. The Advanced tab lets you choose which compiler you want to use and there is also a field for specifying any extra compiler options. The LeJOS tab is for configuring the LeJOS Mindstorms environment, and fixes a performance problem when loading a directory with more than 500 items in it.