Cold Email Hacks - Proven cold email templates and tactics for B2B startups
BeeFree - BeeFree is an all-in-one solution that works anywhere you are.
Cold Email Analyzer by Mailshake - Real-time analysis of email subject lines and copy
Mail Designer 365 - Discover Mail Designer 365, the easiest way to design mobile-optimized HTML emails, templates and newsletter designs. Your HTML email designer for Mac.
Mailshake - Mailshake lets you build your professional network through a smart and intuitive approach to cold emailing.
MJML - The open source framework for responsive emails