Homebrew - The missing package manager for macOS
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Homebrew Cask - Install with ease. Your software is just one command away from being ready and raring to go. Forget all about babysitting the install process step by step, from website to cleanup. ls /usr/local/Caskroom google-chrome .
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
MacPorts - The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system.
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.