Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Dux Soup - Dux-Soup is a lead generation tool for LinkedIn.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
CloudSponge - Companies from every industry use CloudSponge’s Contact Picker to get access to their users’ address books.
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.
BuzzBuilder - BuzzBuilder is a web-based lead generation tool that manages targeted email marketing campaigns and generates B2B sales leads.