Back in 2007, a book Typographic matchmaking was published along with a CD with free beta versions of fonts produced for the projects. THe CD included early version of Fedra Arabic, however the fonts were not yet vocalised with dynamic mark positioning in fonts.
Adobe CS4 and CS5 officially doesn't support Arabic. Instead, there is a separate ME version (Middle Eastern) which supports left-to-right languages.
Some old text documents working with Arabic or Indic languages use 8-bit encoding, which required to use proprietary fonts. Such fonts can only use 256 glyphs, which is not sufficient for correct rendering of Devanagari (or other 10 Indic writing scripts).
Typotheque designs and develops Unicode-compliant fonts. Below are some instructions for using Unicode fonts to set Devanagari texts.
QuarkXPress® requires AXt fonts and Layout Ltd’s ArabicXT™ extension for setting Arabic text. AXt fonts are non-Unicode fonts, using the ‘Mac Roman’ encoding; Arabic glyphs are substituted for the Roman glyphs, so for example ‘alef’ replaces capital letter G.