IconFinder is the god of all Icon websites and tools. Its basically an icon search engine that anyone can use for free. All the icons are available to download for free in different file formats and sizes. If your a web designer, this tool is worth having a look at.
You can use this amazing tool at: IconFinder.com
The Main Interface
The main interface of IconFinder is much like Google. It has alot of white-space, a big logo and the search box. There is of course some stats about how many icons they have indexed.
Searching For Icons
When you search for an icon (I have searched PhotoShop as a demo) it comes up with all the search results in beautiful boxes. There are literally hundreds of icons per search.
Filtering Your Search
Below the searchbar (after you have performed a search) are options you can configure to filter your search results. These include how many icons you want to list per page and the background colour of the icon.
You can also filter your search results by the icon size and the licence it holds.
Viewing An Icon
When viewing an icon, you can see everything about it. You can download each icon in .png or .ico.
Also, below the icon listing, there is a box that lists all the other icons that the set contains.