Cloze - Smarter Relationship Management
V12 Data - V12 Data offers rich data sets with verified addresses and emails for personalized marketing campaigns.
Propeller CRM - Small business CRM with deep Gmail integration
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
Streak - Manage customers inside Gmail
Clearbit - Clearbit provides Business Intelligence APIs