1Password - 1Password can create strong, unique passwords for you, remember them, and restore them, all directly in your web browser.
SaaSiter Contacts Importer - Allow users to import contacts into their system.
bitwarden - Bitwarden is a free and open source password management solution for individuals, teams, and business organizations.
CloudSponge - Companies from every industry use CloudSponge’s Contact Picker to get access to their users’ address books.
Minimalist - Password manager for iPhone, iPad, Mac, with iCloud Sync
OpenInviter - OpenInviter is a free import contacts (addressbook) script from email providers like Mail2World...