Flow - Stop managing projects from your inbox.
Pomotodo - Todo-list based on Pomodoro technique.
Tide - Tide is probably one of the most popular relaxing and productivity boosting platforms available over the internet.
Pomodoro Time - Simple Pomodoro timer in your Mac's menu bar
Be Focused - Focus timer for work and study
Pomodoro.cc - Manage your time more effectively - Boost your productivity