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.
Lightspeed - retail and restaurant point-of-sale, ecommerce, and omnichannel solution
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Floreant POS - Floreant POS :: Open Source Point of Sale – Think POS Think Floreant
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
uniCenta oPOS - Award winning Point Of Sale