3D Look & Feel
- Markus Hillenbrand's three dimensional alternative.
- http://www.hillenbrand.name/3dlf/

Synthetica
- Based on Synth, offers an enhanced JFileChooser and rounded borders. Includes download, FAQ, and screen shots.
- http://www.javasoft.de/jsf/public/products/synthetica

Napkin Look and Feel for Swing
- Offers mailing list signup, CVS access, and documentation.
- http://sourceforge.net/projects/napkinlaf/

Audio Look and Feel Project
- Effort to provide audio feedback with keyboard control.
- http://snow.utoronto.ca/index.php?option=com_content&task=view&id=132&Itemid=91

Slaf
- Simple look and feel, with goal of less resources and themes.
- http://www.desnoix.com/guillaume/slaf/

jThemeManager
- A library that allows dynamic loading of java LookAndFeel "themes" from Jar and Zip files. [Open source, LGPL]
- http://jtheme.sourceforge.net/

Tonic Look and Feel for Swing
- A new pluggable look and feel for Java Swing. Tonic provides a clean look without graphical noise and clutter. [Free for non-commercial applications]
- http://www.digitprop.com/p.php?page=toniclf&lang=eng

javootoo.com
- Repository of pluggable look and feels. code snippets for Swing programming, tips for JNLP applications. Also provides forum.
- http://javootoo.l2fprod.com/

The Alloy Look and Feel
- A look and feel with four highly aesthetic themes, rollover effects and support for all Swing components. [Commercial]
- http://www.incors.com/lookandfeel/

Teknolust
- Early custom pluggable look and feel.
- http://www.geekfarm.org/emeade/teknolust_plaf/index.html

NextStep
- Provides NextStep appearance for Swing applications.
- http://hp.vector.co.jp/authors/VA008030/swing/

GTK/Swing
- Effort to imitate the imitate the default theme of GTK.
- http://gtkswing.sourceforge.net/

Kunststoff
- Simple aesthetic extension to the standard Metal Look and Feel. [Open Source, LGPL]
- http://www.incors.org/