Google Fonts - Making the web more beautiful, fast, and open through great typography
Font Generator - Tons of font ideas in one click
FontJoy - Get smart font pairings in one click
Typewolf - Typewolf helps designers choose the perfect font combination for their next design project—features web fonts in the wild, font recommendations and learning resources.
Irregular Expressions - Virtual keyboard for writing expressive messages in various text styles
FontFriend - Preview Google Fonts on any Webpage