Toodledo - Toodledo provides a set of tools to increase the productivity.

Kippa - From inside Teams, Kippa reminds you or your team-members about events to keep the team running like clockwork.Kippa's five-minute learning curve enables you to quickly set personal and shared reminders, (@mentions), or to Private Channels.

Calcurse - Calcurse is a calendar and scheduling application for the command line.

Reminder - A better way to keep track of your reminders 📝

Push It - Simple location aware messaging

doo - A smart, simple app for reminders and to-dos