University of Kent
BlueJ
FreeLearn how to develop in java on introductory level.
WindowsGreenfoot
FreeWrite games and simulations in Java using integrated development environment.
WindowsBlueJ for Debian and Ubuntu
FreeUse an easy-to-use teaching environment for the Java language.
LinuxBlueJ for Linux
FreeUse an easy-to-use teaching environment for the Java language.
LinuxBlueJ
FreeInteractive Java development environment with UML.
MacGreenfoot
FreeEasy development environment for Java games & animations.
Mac