Leon - Leon is a scheduling software for aviation that helps to manage day to day aircraft operations with sales, crew, OPS & maintenance features.
Calspex - Calibration
Aircraft Cost Calculator - Aircraft Cost Calculator is a web-based solution designed to determine the operating costs of aircrafts and helicopters in the database.
GageList - Simple online calibration software
AMC Aviation - Airline Maintenance and Engineering
QMSys GUM - Calibration