Markus Hillenbrand's three dimensional alternative.

Effort to provide audio feedback with keyboard control.

A color 3D extension of the Java Metal Look and Feel adding color capabilities as well as texture backgrounds. One of the added features are "hierarchical tabs", which allow to communicate a hierarchical structure. [Open source, MPL]

Effort to imitate the imitate the default theme of GTK.

Repository of pluggable look and feels. code snippets for Swing programming, tips for JNLP applications. Also provides forum.

A library that allows dynamic loading of java LookAndFeel "themes" from Jar and Zip files. [Open source, LGPL]

Simple aesthetic extension to the standard Metal Look and Feel. [Open Source, LGPL]

SourceForge project. [LGPL]

Provides NextStep appearance for Swing applications.

A cutie cute look and feel for Swing. [Freeware]

Simple look and feel, with goal of less resources and themes.

Early custom pluggable look and feel.

A look and feel with four highly aesthetic themes, rollover effects and support for all Swing components. [Commercial]

A new pluggable look and feel for Java Swing. Tonic provides a clean look without graphical noise and clutter. [Free for non-commercial applications]