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.

AttendanceBot - Time & attendance tracking for distributed teams

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

Shiftee - Shiftee streamlines the process of employee scheduling, time clock attendance to payroll by providing a solution to manage and help business

Clockify - Simple and free time tracker. Perfect for small and mid-sized businesses as well as freelancers. Unlimited projects and users, unlimited productivity. Get all the premium functionalities, completely free.

teamdeck - Teamdeck is a SaaS resource management tool with resource scheduling, leave management, time tracking and timesheet, and customizable reports features. Selected by Hill-Knowlton, Stormind Games, Wunderman Thompson. $3.60/per member.