Hourglass - Hourglass is the most advanced simple countdown timer for Windows.
Online Alarm Kur - Free online alarm clock, set alarm easily on your computer using the internet alarm clock without downloading any software, wake up in time with the loud online alarm clock.
vClock - Web based time tools including Alarms, Timers, Stopwatch, and World Clocks. vClock is customizable and has a clean user interface.
YAPA-2 - YAPA-2 is a minimalistic desktop timer app for Pomodoro Technique users.
KukuKlok - Kukuklok is a free alarm clock available online and offline.
YAPA - Pomodoro timer