PigeonBot - Send emails via Slack with the /email command
Cold Email Hacks - Proven cold email templates and tactics for B2B startups
Inbox Ignite - Prevent your emails from going into spam
Cold Email Analyzer by Mailshake - Real-time analysis of email subject lines and copy
Thunder Mail - Cheap and simple transactional emails API with Amazon SES
Mailshake - Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.