Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
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.
CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
CallerSmart - CallerSmart is an application that is basically used for the purpose of looking up mystery phone numbers for free.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.