Fabien Quatravaux

<a href="http://www.fontsquirrel.com/" rel="nofollow ugc">Font Squirrel</a> is your best resource for FREE, hand-picked, high-quality, commercial-use fonts. 
They provide a large part of their fonts in a web-embedding-ready way that is supported by all major browsers (@font-face CSS method).
The provided formats are : 
* TTF – Works in most browsers except IE and iPhone. 
* EOT – IE only. 
* WOFF – Compressed, emerging standard. 
* SVG – iPhone/iPad
They provide an API to list, preview and download fonts very easily : this unofficial plugin is using this official API.
When you browse fonts and dispplay one with this plugin, the font is downloaded from fontsquirrel.com. If you then choose to install the 
font, its css rule is put in the head section of you website pages so that you can use it on any page. The WordPress built-in editor 
(TinyMce) has a dropdown list that lets you choose the font you want for each part of your site.

Font Squirrel (unofficial)

Bring fonts from fontsquirrel.com into WordPress. Fonts kits are downloaded into your content directory and linked with @font-face.

Adrian Hanft

<a href="https://appsumo.com/search?tags=wordpress&utm_source=sumo&utm_medium=wp-widget&utm_campaign=wp-google-fonts" rel="nofollow ugc">Check out the latest WordPress deals for your site.</a>
Google’s free font directory is one of the most exciting developments in web typography in a very long time. The amazing rise of this new font resource has made this plugin the most popular font plugin on WordPress and it shows no signs of stopping.
The WP Google Font plugin makes it even easier to use Google’s free service to add high quality fonts to your WordPress powered site. Not only does this plugin add the necessary Google code, but it also gives you the ability to assign the Google fonts to specific CSS elements of your website from within the WordPress admin. Or if you would rather, you can target the Google fonts from your own theme’s stylesheet.
Right now, the Google Directory has hundreds of great fonts, and the selection is steadily growing. As new fonts are added, we will release updates to the plugin quickly so you can start using new fonts as they become available. It truly is an exciting time to be creating websites, and I hope this plugin helps you create some great stuff. – Adrian3

WP Google Fonts

The WP Google Fonts plugin allows you to easily add fonts from the Google Font Directory to your Wordpress theme.

Font Squirrel (unofficial) vs WP Google Fonts