There’s nothing I like more than awesome free stuff.  Case in point: the Oxygen icon set.  Designed for the open-source desktop environment KDE, this set is available under the Creative Common’s Attribution-Share Alike License, meaning you are free to use them, distribute them and modify them as long as you attribute them to their original creator.  I’ve used them in a couple of projects (including the Sockit Solutions website) and I imagine I’ll use them in plenty more.  They’re clean, modern and include scalable SVG versions, allowing them to be used at virtually any size.  Here are a few samples from the set:

Big Teeth Smile Face Man:

Old-school printer / CB Radio / Alarm Clock (?):

A hammer:

A hammer + UN Flag:

I’m hosting the Oxygen icon set on my site since I had difficulty finding a download location that wasn’t RapidShare.  To download them, click here.