Ninite - Ninite is the easiest way to install software.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
MacUpdater - MacUpdater - keep all your apps up-to-date effortlessly
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Sumo - Free tools to grow your email list.
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.