The following site is recommended for professional genealogical research in Malta:

http://www.genealogyservicesmalta.com/

Some of the more important non-commercial genealogical sites are listed here.

Cyndis List

Genealogie delle dinastie italiane by Davide Shamà and Andrea Dominici Battelli

Genealogy.eu by Miroslav MAREK

Paul Theroff’s Royal Genealogy Site

Italian  Titles of Nobility and Genealogy

José Verheecke’s Genealogical Site

Malta Genealogy.com by Charles Said Vassallo

Messina and its connection with the Maltese Nobility    

Maltesenobility.org – a website dedicated to the history of Maltese Noble families and Nobility in Malta

Notarial List Malta

The Order of St John – A Genealogical Table

The Society of Genealogists