17hats - The all-in-one business system for entrepreneurs.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Salesflare - Simply powerful CRM. Automates your data to build better relationships and make more sales.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
GovWin IQ - GovWin IQ is the essential source for information, teaming and software solutions to help organizations find, manage and win government business.
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.