LinkedIn Sales Navigator for Gmail - Rich contact profiles inside Gmail
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Clearbit for Salesforce – Lite - Rich data on every record in Salesforce for free!
Kyte - India's first AI powered SMS inbox
Clearbit - Clearbit provides Business Intelligence APIs
Hiya - Know who's calling or texting and block spammers on Android