CardBook

Rated 4 out of 5 stars

by regwiz on Feb. 23, 2016 · permalink

Thunderbird's built in "Address Book" is very limited and doesn't offer any CRM like (minor) features so it's kept me away from Thunderbird. This add-on offers unlimited flexibility for contact management.
Possible Improvements:
-- Built-in, predefined, extensible IM fields (jabber, skype, etc.)
-- Full VCard 4.0 support can make this add-on a life-saver for millions
-- Company / Contact diversity