Fonts.com - Download over 8,000 Fonts! - Find all the fonts you could ever need. This site has over 7000 different typefaces to choose from!

ITCfonts.com - Download over 1,000 PostScript and TrueType Fonts! - An international leader in typeface design and marketing for over 25 years, ITC collaborates with world-class designers to provide a library of more than 1,000 classic typefaces and innovative new designs.

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The Font Pool - Over 1000 categorized truetype fonts, with previews and character maps for you to download. Windows and Mac fonts.