Online timer - Online timer is a free and easy-to-use tool that comes with a very simple way to get done with measuring time and alarm.
Freshservice - Freshservice: the one-stop cloud solution for all your IT management needs.
Timer Tab - Online countdown timer, alarm clock, and stopwatch.
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
Gestimer - For those little reminders during the day
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.