Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Momentum - Agile goal and performance management
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
New Tab by Flickr - Get a beautiful photo each time you open a new tab
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.
Gratitude Flow - Gratitude Flow is a web extension that allows you to share and receive gratitude on your new tab with real people around the world.