Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
TimeCamp - Simple and robust time tracking app to help you stay on the same page with your team while working from home.
FreshBooks - The ideal accounting software for small business owners.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
InvoicePlane - Free and open source invoicing application to host on your own server.
Time Doctor - Time Tracking and Time Management Software that is accurate and helps you to get a lot more done each day.