Agile software development, become one of the most applied methods and principles in software development industry. That methodology offers some advantages in managing time and requirements from the system user. However, it has some disadvantages in managing project resource such as codes, documentation, and knowledge which emerge in the developments process. Other weakness of agile software development was too focused on the functionality of the system. Those problems can be solved by combining it with other methods. This paper is a systematic literature review which used PRISMA as a method to gather literature regarding the improved agile methodologies from three paper databases, including Science Direct, IEEE Xplore, and ProQuest. As the result, we obtained 15 papers which explained the improved agile software development in all of its aspects, such as its time, documentation and usability.