Seldom that I find something on the internet that is free and legal at the same time. It is so rare that I find stuff like these (I use them on my websites) that I could not wait to post it here. Thank God for Creative Commons and Sourceforge :)  Thank you creator of http://projects.sublink.ca/sweetie/
150+ clean and clear icons to use in your nifty web application. They are licenced under a Creative Commons licence, so commercial use is fine. Also feel free to make derivatives with the included Photoshop document

SAMPLES:  

You can download your copy here.