Change is law of nature. As far as software industry is concerned, a software development method once popular may prove to be the worst in the near future. Agile development has emerged as a very popular means of software development lifecycle model in recent times with more and more companies starting to adopt this methodology in their organizations. However, there are varieties of Agile methods and practices which can be adopted according to their relevance to the current environment of an organization. In this paper Agile development concept and different Agile methods have been introduced for beginners highlighting major differences and similarities among them. This paper gives insights into the Agile methodologies like Scrum, Agile Unified Process, Extreme programming, Feature-driven Development, Dynamic Systems Development Method, Crystal, Adaptive Software Development, Kanban, Lean Software Development and Agile Modeling.