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Google Contacts - Google Contacts is Google's contact management tool that is available in its free email service Gmail, as a standalone service, and as a part of Google's business-oriented suite of web apps Google Apps.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Apple Contacts App - Access and edit your contacts from personal, business, and other accounts with the Contacts app.
BizConnector - BizConnector offers marketing and workflow automation solutions to small businesses.
Windows Contacts - Windows has many extraordinary organizers, and in the event that you include distributed storage, then you presumably have more.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.