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.

vtroia

TrueType Font Generator, or TTFGen, is a combination of PHP and jQuery which allows you to use custom fonts on your website which are guaranteed to be cross browser compatible and SEO Friendly.
TTFGen automatically generates static text images based on your own set of parameters. A small jQuery script is used to call the PHP image renderer, which uses the TTF file to generate the image.
TTFGen is SEO friendly because it uses jQuery to replace text within your website after the page loads.
<h3>Standalone</h3>
You do not need to use wordpress to use TTFGen. Visit www.ttfgen.com to download the standalone jQuery/PHP version.
<h3>Donations</h3>
We know that everyone’s time is valuable. If this plugin saves you endless amounts of time from manually creating images for your website, we hope that you will consider a small $2 donation.

WP-TTFGen

TTFGen allows you to embed fonts on your website by generating static images from your own CSS parameters. TTFGen is 100% cross browser compatible.

Font Squirrel (unofficial) vs WP-TTFGen