#1
Tabata
You can define workouts with activities for different time periods, and then tracks the workout and receive notice to change activities. For example:
The Largest Curatorial Library
With Seconds
#2
HTML5 Canvas Javascript Clock HTML5 Website
#3
jQuery Time Zone World Clocks
These jQuery world clocks are easy to implement, easy to skin, and only require you to add 5 lines of code to your PHP. You can add as many clocks in as many timezones as you like. You can keep them in a grid or place them throughout your page as needed.
#4
Active Clock
Update 05.08.2014 Add the WP plugin to “Main File” as the bonus 03.28.2014 Enable show/hide AM/PM Enable show/hide date, month, day 03.26.2014 Add support for accepts decimals time zone