Google Web Fonts is a great directory of free-to-use and open source web fonts. Not only the fonts are free but they are also served from the Google's fast servers.

And, there are many items in that directory which may make finding the one you need hard.

Best Web Fonts is a web app which aims to simplify the process of finding the right Google Web Font.

Best Web Fonts

It is a curated directory which you can instantly test the fonts and get the embed codes. All in the same page.

Also, there are various CSS effects provided which can be previewed with the font of your choice too (the CSS of the effects are available for use as well).

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