Leon - Leon is a scheduling software for aviation that helps to manage day to day aircraft operations with sales, crew, OPS & maintenance features.
Gone - An ephemeral to-do list
Aircraft Cost Calculator - Aircraft Cost Calculator is a web-based solution designed to determine the operating costs of aircrafts and helicopters in the database.
Streaks - The to-do list that helps you form good habits.
AMC Aviation - Airline Maintenance and Engineering
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.