Google Contacts
Free
Google Contacts is Googles contact management tool that is available in its free email service Gmail.
Memotoo
Commercial
Memotoo sync all your contacts from Gmail, Facebook, phone, Thunderbird, Outlook, etc in a single address book.
Contacts
Commercial
Contacts is a default contacts management app for Mac based operating systems.
Kontact
Open Source
Kontact is a personal information manager and groupware software suite developed by KDE. It supports calendars, contacts, notes, to-do lists, news, and email.
fruux
Freemium
fruux is a cross-platform synchronization service.
FCorp ID Book
Free
FCorp ID Book is a portable, light but powerful address book.
Compare FullContact with alternatives
Compare Google Contacts and FullContact and decide which is most suitable for you.
Compare Kontact and FullContact and decide which is most suitable for you.
Compare Memotoo and FullContact and decide which is most suitable for you.
Compare Contacts and FullContact and decide which is most suitable for you.
Compare FCorp ID Book and FullContact and decide which is most suitable for you.