They have a collection of over 32,000 free fonts shared by designers around the world.
Open Font Library
The website houses a large repository of free fonts under a Creative Commons license, which can be used without any restriction, even modifying them to create your own fonts.
The league of moveable Type
“No more bullshit. Join the revolution “. This group goes a step further to eliminate the limitations of the web as far as typographies are concerned, as they not only look for free fonts, but good quality and open source. On this website you can find also many free fonts.
Open source publishing researches the potential of Open Source (FLOSS) tools in a professional design environment. And they have added their digital typographic catalog. One of the projects collected in this collection of typographic fonts is DLF (dingbats liberation fest), which proposes to redraw various symbols and Dingbats characters from the Unicode list.
In Font Squirrel, we can find a great fonts (more than 500) to download. These are sorted by categories and we will find other resources of interest related to the topic. We must be careful with the use we give, since there are free sources, but there are also commercial with their respective licenses.
Though it´s not a site fully dedicated to fonts, you may find many free projects in the “fonts” category.
Bonus: A Web Designer’s Guide to Linux Font
A complete article describing the fonts history and fonts features in the GNU/Linux universe.
Bonus: Linux Font Equivalents to Popular Web Typefaces
An article describing similarities between Linux’ fonts and Win/Mac fonts. It would be useful for designers or if you work with different platforms.