MyFonts is styled more like a font blog than a lot of other font resources. Featured fonts rotate on the front page, and there’s a tag cloud with all the most popular tags. Another cool thing is their list of popular designers in the sidebar. If you really like someone’s style, you can easily find more about them and maybe follow their new developments.
Dafont is where I get most of my fonts from. It’s easy to browse, and very well organized by category. If you’re going for a specific look, like Horror, Grunge, Futuristic, Elegant, etc., there’s almost certainly a category already in place. It also has the usual classifications of serif and sans-serif.
Like dafont, urbanfonts is a huge resource. Plenty of categories mean that you’ll definitely find something new, though it might mean wading through a lot of stuff you don’t particularly care for. Note that there’s nothing particularly urban about the font selection — it has all kinds!
Another large library, Fontica has over 2,000 free fonts ready for download. It’s loaded a bit heavy with advertisements, but it’s not too much of a distraction; you can certainly find what you need without too much hassle.
Fontspace has almost 10,000 fonts, plenty of dingbats and decorative fonts that you could use in a variety of projects, or just for toying around in Photoshop. One very cool feature is that, when browsing, you can type custom text to preview in each font family. If you’re only going to use a typeface for a single logo or word, this comes in very handy.
Of the sites listed, Fawnt is probably the easiest and most fun to browse. It has a comparatively limited selection, but you use a very simple JavaScript interface to move up or down the list twelve at a time. There are less than 100 fonts available, but they’re all readable and high quality. That is, no wild handwriting and dingbats that you’d probably never use outside of your experimental personal site. If you want to be sure to get something professional and moderate, Fawnt is a great idea.
exljbris is a professional font foundry, not a font directory, so of course the volume of fonts here is a lot less than elsewhere. However, everything is very well done, with proper attention to kerning and all that jazz. No Comic Sans derivatives here.
Another big one. I’m not sure if they put a cap on the number of fonts so that there are exactly 1001 and no more (doubtful), but in any case, there are plenty here. You’ll probably start to notice overlap with other font sites after a while, but that’s to be expected, since a lot of font designers would submit their designs to multiple directories.
Like exljbris, Floodfonts is a professional resource (one guy, Felix Braden). His fonts are a bit more experimental, with more flourishes and exotic tendencies. Great place to go if you’re looking for a font that’s probably not all over the web already. On an unrelated note, he has quite a few nifty navigation animations scattered around.
Fontleech is a blog. No fonts are hosted here, but there are frequent posts with reviews of new font packs available on other sites. The site itself is styled very sparingly, reminiscent of I Love Typography. Fontleech is nice if you want to keep track of the font community as a whole.