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.
SendLater - Email scheduler for Mac Mail.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Assistant.to - GoToMeeting. Put your GoToMeeting link in the Assistant. to "Location" field. Once the recipient selects a time, you will both receive an invite with a unique GoToMeeting link.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Shortwave - Email smarter & faster with a reinvented experience for your Gmail