Mental disorders are the main cause of disability worldwide, and they cause a high social impact, a significant deterioration in people's cognitive and physical level and an important economic weakening to current health care systems. These facts show the importance of design, development and implementation of applications aimed at achieving an improvement of patients' quality of life. This paper researches and analyzes several technological applications in this field and how they contribute to improving the situation of the three main actors: the patients, society (family, physicians, caregivers, etc.) and the healthcare system.