Kerning is the process of adjusting the spacing between two specific letters or pairs within typography. It’s not to be confused with tracking which is the spacing between letters (letter-spacing) or leading which is the spacing between lines (line-height). The kerning process has been used throughout the history of printed text but is less commonly used on the web.
Here’s a round-up of some of my favourite fonts available, for free, from Google Web Fonts. They include serif and sans-serif type fonts and can used on websites, posters and to fulfil your design needs.