Arabic language and literature
Sakhr Dictionary (Arabic script)
Edward Lane's Arabic-English Lexicon
Princeton Online Arabic Poetry
Alwaraq textual database (IE 5.0)
Near Eastern booksellers (Cambridge University Library site)
Persian language and literature
Steingass's Comprehensive Persian-English Dictionary
Dehkhoda and Mo`in dictionaries (searchable)
Dehkhoda's Lughat-nameh (separate site)
Dr. Karimi-Hakkak's Persian Tutor CD
Persian Literature
Persian, not Farsi
Ganjur: hypertext Persian writings of 35 major Persian poets
Urdu language and literature
Platts' Dictionary of Urdu, Hindi, and English