Did you know the Arabic script is the second most-used writing system in the world? (source)
In case you happen to be looking for a decent Arabic font for your website, software, or publication, I've run across a few good ones that have an open license:
- DejaVu Sans and DejaVu Sans Mono
These fonts support a lot more than just Arabic, but they do Arabic quite well. They come bundled with most GNU/Linux distributions. There are other DejaVu fonts, but as far as I can tell they don't support Arabic.
- Droid Naskh
This font was created by the Arabic typographer Pascal Zoghbi for Google. You can read more about it here: http://www.29arabicletters.com/foundry/?m=1-1-1&fid=26
This is the Arabic font for the Android OS. it was commissioned by Google and created by Ascender Corporation.
A font from the folks behind the Arabeyes project supporting Arabic on *nix. More about this font and other fonts by Arabeyes here: http://projects.arabeyes.org/project.php?proj=Khotot
- SIL Arabic fonts
SIL has released two fonts under an open license: Scheherazade and Lateef. Note that these fonts don't contain individual glyphs for all of the forms (initial, medial, final), and so if you use them in an environment that doesn't support the advanced shaping features of OpenType or AAT (such as Android), the letters won't be properly connected.
Yet another Google commissioned font, this one appears to still be in progress. Interestingly, it bears a strong resemblance to DroidSansArabic. You can read more about its development here: http://shashafont.com/
- Ubuntu Arabic font
(Thanks to Phil R for pointing out this one)
It looks like Canonical (the company behind Ubuntu) has commissioned Dalton Maag to create an Arabic font for Ubuntu. Nothing released yet, but here are some previews:
Ubuntu Arabic, in print!
Hebrew and Arabic on track