Kempelton
My newer icon set, combining a distinctive clean look with my usual focus on functionality.
Mozilla Firefox themes
Get Kempelton on Firefox Add-ons
Kempelton Large
A theme with extra large icons.
SVG files
The original vector files of the icons. 
The Kempelton icon images and vector files are licensed under a Creative Commons Attribution-Share Alike License. Provide attribution by linking to my website.
Updated 2010-01-20.
From other people
KDE icon theme by Schiwi