Intervally - Interval Timer - Sport & Health

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.

HIIT Interval Buddy - Let Interval Buddy help you with your high intensity interval training - a popular method of high-impact cardio fitness training that reduces time spent in the gym and makes cardio training less of a bore.

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

HIIT (Watch) - A very simple interval timer engineered for Apple Watch

MetaClock.com - MetaClock is an Online Alarm Clock that can play YouTube videos and uploaded MP3s as an alarm tune. It supports Chromecast which means you can turn your TV or stereo system into an alarm clock. No installation is needed, it can also work offline.