Countdown to Inbox Zero - Always respond on time
Power Nap App - Best napping timer with relaxing sleep sounds
stagetimer.io - A speaker timer in the Cloud
Earth.fm - Earth.fm is a non-profit, growing library of pure, high quality nature sounds from around the world.
Coountdown - 3 2 1 ! Create day counter on menu bar macOS. 🚀
MyNoise - Custom shaped online noise machines. Many Many generic sounds