Checkfront - Checkfront is built for Tour & Activity Operators, Rental companies and Accommodation providers. Manage your inventories online, centralize reservations, process payments and get unified access to leading distribution channels.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

SnapCalendar.io - Automate scheduling with our app: no more manual reminders. Reduce no-shows, boost visits.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

SimplyBook.me - Online scheduling software that offers you a beautiful customisable booking website (or widget to your own website) to accept bookings and payments with the possibility of selling products as well.

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.