There is such problem: to make an address book with a web interface, with the ability to add users to contacts, the ability to search and filter by category of contact (name, address, phone, etc.), as well as the ability to send emails to these contacts. Considered program leadertask and exaland assistant, but no web-interface, which is unacceptable. Tell me, what software to pay attention to? The option of a "light" CRM is allowed, but not in preference because do not need the organizer, and simple address book with a simple user interface.