A Swing component for displaying vector graphics and animation. It can deal efficiently with very large vector images e.g. geographic maps or electronic circuits.

ExplicitLayout layout manager (Commercial) and EventInitializer to replace your anonymous inner classes (BSD).

Applets, beans and applications. [Freeware]

Utility class libraries: VMMemoryWatcher library that visually track memory changes in Java Virtual Machine; Flow monitor library that visually track process flow between containers. [Open source]

A library for graphs, diagrams and networks, with an option for automatic layout by Northwoods Software. [Commercial]

Subclass of java.awt.Color that knows 752 colors by name - can be substituted for wherever java.awt.Color is used in programs. [Freeware]

Manipulation methods for inversion, rotation, shifting, adding, loading, saving and creating images. (Open Source)