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.

Everhour - Everhour is one of the best time tracking tools for teams. See who’s tracking time, who’s overworked and who can handle more. Keep track of all your project budgets, schedule threshold alerts, use forward resource planning.

Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.

RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.

timr - Digital employee and project time tracking for SMEs

TimeCamp - Simple and robust time tracking app to help you stay on the same page with your team while working from home.