Test it out at pomato.surge.sh
Pomato is a simple productivity timer, based on the Pomodoro Technique. It shows your currently remaining time in the favicon, and is meant to be pinned as an app tab.
Currently it counts down from 25 minutes (or whatever the user sets), and has a reset button. In the future I plan on adding breaks, time tracking / logging, and syncing across devices (login with social media / github?).