Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
FocusList - Daily planner & focus timer based on timeboxing and pomodoro
Go Fucking Work - Website blocker so you can get back to your fucking work
Aika - A simple alternative to Google Calendar for timeblocking/timeboxing.
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
Pomotodo - Todo-list based on Pomodoro technique.