NetHunt CRM - Turn Gmail into a smart CRM
Hexospark - Email automation + CRM designed to spark conversations.
ChartMogul CRM - The first CRM tailor-made for B2B SaaS companies
Spark Mail - Spark helps you take your inbox under control. Instantly see what’s important and quickly clean up the rest. Spark for Teams allows you to create, discuss, and share email with your colleagues
Streak - Manage customers inside Gmail
Salesflare - Simply powerful CRM. Automates your data to build better relationships and make more sales.