V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
ZaapIT - Mass Merge, auto merge, duplicates cleanup, bulk edit, bulk update, bulk delete , mass lead convert
Adobe Audience Manager - Adobe Audience Manager is a data management platform that integrates online and offline data to deliver a unified view of all your audiences
Duplicate Check - Start creating data happiness. Find, merge and prevent duplicate records in your Salesforce Organization.
Clearbit - Clearbit provides Business Intelligence APIs
Apsona for Salesforce - Apsona for Salesforce is an add-on application for Salesforce to manage the data.