Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Xmind - Xmind is a brainstorming and mind mapping application.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
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.
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.