GetYourGuide - Get tickets to the most popular attractions while travelling
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Klook - Discover & book amazing experiences at exclusive prices
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Airbnb - Book unique places to stay and things to do.
EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.