Icon fonts are awesome. Other than the fact that they have to be single color, they are superior to using images as icons in every way. But which do you choose? There are loads of different sets out there. I'm going to attempt to round them all up here and keep this updated (this post has already been updated several times).
Pictos is the icon font that really popularized this whole idea. In additional to the sets, they also offer Pictos Server, a service which allows you to build your own font set from its library of icons and will host/serve it to you. This allows for very small (quick loading) font files and a nice UI for updating your current sets.
... read the whole story at css-tricks.com.