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.
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
TimeCamp - Simple and robust time tracking app to help you stay on the same page with your team while working from home.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.