Email

Zenbe integrates an intuitive email interface with calendars, task lists, address book, collaboration and more.

Relenta CRM is a small business CRM software designed to facilitate work of sales, marketing and customer services teams.

Threadsy is an integrated communication client. It pulls together your existing email, Facebook, Twitter, chat, and the broader social web into one experience.

Subscribe to your favorite RSS feeds and receive daily or real-time updates in your email.

LetterMeLater.com allows you to send emails, with the ability to have them sent at any future date and time you choose.