Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Codeship - Codeship is a fast and secure hosted Continuous Delivery platform that scales with your needs.
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.