Google Fonts - Making the web more beautiful, fast, and open through great typography
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.
Font Squirrel - Font Squirrel scours the internet in search of FREE, highest-quality, designer-friendly, commercial-use fonts and presents them for easy downloading. We don't have the most, but we do have the best.
FontJoy - Get smart font pairings in one click
Open Font Library - The mission of the Open Font Library is to promote your freedoms as it relates to the use of type.
Font Generator - Tons of font ideas in one click