Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Pegasus Mail - Pegasus Mail has been in existence longer than any other PC email client.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
Windows Live Photo Gallery - Get help and how-to info for Windows Essentials—including Windows Live Mail, Movie Maker, and more.
Lotus Notes - Lotus Notes (also known as IBM Notes) is the email client solution that gives teams access to email, calendar and contact management and seamlessly integrates IBM collaboration tools and IBM domino business application.