TypeFront is a font distribution platform that gives designers and font sellers the tools they need to take advantage of the new wave of downloadable font support in web browsers.
Typekit is a subscription-based service for linking to high-quality open type fonts from some of the worlds best type foundries. Fonts are served from a global network on redundant servers, offering bulletproof service and incredible speed. And it couldn't be easier to use.
FFonts is one of the very best font resources with literally thousands of fonts available for download. Mainly high quality fonts that may easily be used in professional designs. The site is simple to use and provides a good overview of the available font.
FontStruct is a free font-building tool. It lets you quickly and easily create fonts constructed out of geometrical shapes, which are arranged in a grid pattern, like tiles or bricks.
Fawnt is a resource for designers, developers, and anyone that loves free fonts. Fawnt lists beautiful fonts in nice speech bubbles coupled with a scrollable interface to make browsing easy.