Music - Historic and Auditorial Content

Digital Music Collections in The Library of Congress   (Scanned documents and auditorial content) 
The Classical Music Archives (Auditorial content) 
Classical Music Navigator (History of music) 
Classical Net (History of music)  
Online Thesaurus of Italian Jewish Music (History of music and auditorial content)

 Music Institutions and organizations in Israel 

Israel Music Institute
Israel Composers' League
Israel Philharmonic Orchestra
Jewish Music Research Centre - Hebrew University
The Music Collection and Sound Archive - The National Library of Israel
Israeli Opera
Hibba - Israeli Heritage Movement (in Hebrew)

Hebrew songs and Piyyutim

Zemereshet (in Hebrew)
The Piyut and Tefillah Website - From the Snunit Association
Shironet (in Hebrew)
Bukhara Jewish Tradition (Ethnographic recordings of the musical tradition of Bukhara Jews recorded by Dr. Yelena Reicher)
Online Thesaurus of Italian Jewish Music

Reference Guides and Tools in Searching and Bibliography

BrowZine - A Smart Way to Browse Electronic Journals 
LibKey Nomad - Browser extension for downloading full text
Bibliography Management Software

Others

Copyright, Entertainment and Law in Israel 
Doctoral Dissertations in Musicology (Musicology, Theory, Ethnomusicology, and more)