Soundly - Functional music for better sleep, focus and relaxation

Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.

Forest App - Forest is an app that helps you stay focused on the important things in life.

Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.

Deepwork.fm - Minimalistic "radio" with 4 channels

Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.