Vimcal - Vimcal is the world’s fastest calendar, beautifully designed for people who work remotely and live in their calendars.
Tabwave - Replace your new tab with a mindful productive app
Add-to-Calendar Button Generator - This open source projects lets everybody create amazing buttons, where users can add events to their calendars.
Reboot - It's okay to take a break
Plan - Plan is a better way to organize.
Breaktime - Break time is an app that reminds you to stand up every chosen amount of time.