This paper reviewed some recent mobile context- aware applications that were developed based on context-aware computing technology. The basic definition of context was provided and different context categories were listed. Then the scope of review applications was defined by specified classification categories, and a sample application for each group was briefly discussed. Afterward the impact of context-aware application on HCI was explained. It can be concluded from the current research and applications that the context-aware concept is widely used in information technology and it will highly affect the future of human computer interaction.