Salesflare - Simply powerful CRM. Automates your data to build better relationships and make more sales.

Hexospark - Email automation + CRM designed to spark conversations.

Tall Emu CRM - Tall Emu CRM is built to be customizable and to work the way the business works; and not the other way around.

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

Zoho CRM - Omnichannel CRM for Businesses of all sizes

Mailtrack.io - The best email tracking solution I've found. Free