Icon fonts are becoming ever more popular because they're much more useful than ordinary images. With icon fonts you can adjust their size and colour a lot more quickly than images. You can also add CSS effects to them such as shadows, and generally are much more customisable.
Finding good and well designed icon fonts can be difficult though and most of the best ones you have to pay for. But if you're looking for a basic good looking icon font, we've got five free ones here which are available for download.