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.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Rust - A safe, concurrent, practical language
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.
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible