Hourglass - Hourglass is the most advanced simple countdown timer for Windows.

Wod Blocks - A full workout timer

Alarm Clock Tab - Web based time tools including alarms, timers, stopwatch, and time zone converter. Resources also include Tabata, Pomodoro and other useful tips and tactics for managing time and time tracking.

Timeglass - Multi-step & spoken timers for your workouts & cooking.

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.

Workout Timer - A simple, customizable workout timer