Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Roundcube - Web-based IMAP email client
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
HEY - Email at its best, new from Basecamp.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.