This chapter focuses on how to develop tools for positive technology and more specifically, mobile emental health systems using a virtual stress counselor. The main objective is to develop a framework for mobile e-mental health systems reviewing existing e-mental health apps and discussing necessary system requirements. The chapter states that current e-mental health apps do not offer any facilities to promote social interaction between the counselor and the user. The proposed framework requires personalized interactions between a virtual counselor and a student. It provides personalized feedback to reduce stress level and enhances personal stress management strategies. This requires integration of technologies for facial expression detection, speech and emotion recognition as well as other psycho-physiological feedback. A prototype system for e-mental health has been developed and the components of the system architecture have been widely discussed including the need for a coping processor. Finally, conclusions are drawn regarding the tools for positive technology.