Saleshandy is a cold email platform that helps organizations increase their email outreach operations without sacrificing quality. On Saleshandy, you can send hundreds (or thousands) of campaigns with multi-stage automated follow-up emails to your leads at once. You can use merge tags to customize your email campaigns and have automated follow-ups delivered based on the previous email's interaction (opens or clicks).
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Mailtrack.io - The best email tracking solution I've found. Free
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.
Yesware - Sell smarter with email tracking and more