This article presents the objectives, methodology and results of a project aimed at improving personal autonomy and adaptation to the workplace of people with cognitive disabilities. These people may have difficulties to be independent in various areas of life, especially at the workplace. Many of these problems are related to issues such as time control, independence in performing tasks, work habits, interpersonal communication, etc. To promote autonomy in these areas, the tool GTT (Time and Task Manager) has been developed. This is a software application running on a mobile device (a mobile phone or PDA) aiming to ease the adaptation to the workplace of people with cognitive disabilities through tutoring tasks, major event management and strengthening of key aspects of work.