Time.is - exact time in any location
Timer Tab - Online countdown timer, alarm clock, and stopwatch.
World Time Buddy - Effortless time conversion and world time.
Gestimer - For those little reminders during the day
timeanddate.com - Free Clock for your website or blog!
Online Stopwatch - Online Stopwatch is free to use online tool that allows you to keep track of the important events and tasks that you are performing.