Elixir - Dynamic, functional language designed for building scalable and maintainable applications
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Rust - A safe, concurrent, practical language
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
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.