ZaapIT - Mass Merge, auto merge, duplicates cleanup, bulk edit, bulk update, bulk delete , mass lead convert
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Duplicate Check - Start creating data happiness. Find, merge and prevent duplicate records in your Salesforce Organization.
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.
Apsona for Salesforce - Apsona for Salesforce is an add-on application for Salesforce to manage the data.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.