A friend had posted on twitter, about a cool tool for project management, called No Kahuna. As an engineer, I have a significant interest in project management, so I had created an account on that site. The system creates a sample project, which I liked, and had cool features. The overall looking of the system seams clean and efficient (I had not tested enough). But what had called my attention most was the nice small (16-by-16 pixels) icons this system has. Looking down at the site footer, It has a note telling it uses silk icons. I imediatly follow that link. They have over 700 icons on that format, which I was looking for my personal systems (web or not).
The icons had a really nice look and I will certanlly use then on my projects.