Google Fonts - Making the web more beautiful, fast, and open through great typography
Fonts Ninja - Try fonts discovered on websites in any design software
FontJoy - Get smart font pairings in one click
Find my Font - Identify any free or commercial font with your camera!
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.
Fount - Identify web fonts on any site