Exempli Gratia is my latest and (I think) greatest icon set. The zip includes PNG, ICN, and ICO format.
The biggest complaint I usually get is that people always wish that there were more icons. I apologize though, I'm but one man, haha. I do like the style of these though and I wouldn't mind adding to it in the future.
The name if anyone is curious is Latin and means "for the sake of example" Hopefully a set like this can live up to that NAMESAKE.