Unibody 8 has an Arabic brother!
There's more to Unibody - next to our standard Latin version of Unibody 8, there is also Al Abdali 8 for Arabic. These two typefaces work hand in hand, both at 8 pts. pixel size on screen.
Al Abdali 8 is designed and distributed by Yanone and is available as a free download too. Go, download. (Note: Al Abdali 8 wasn't made by Underware; for any questions considering Al Abdali 8, please contact Yanone).