Via AWOL and AMIR, several digitized books of linguistic and scholarly interest:
The Jewish National and University Library Digitized Book Repository
Oriental Institute Demotic Dictionary
Arabic Dictionaries:
al-Jawharรฎ: Tรขj al-lugha wa-sihรขh al-โarabiyya
Ibn Manzรปr, Lisรขn al-โarab
az-Zabรฎdรฎ, Tรขj al-โarรปs
al-Azharรฎ, Tahdhรฎb al-lugha