1 Copyright © 2011, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 1 Web 2.0 Technologies in E-Learning Utku Köse Afyon Kocatepe Unviersity, Turkey InTRODUcTIOn Ways of using the World Wide Web personally and professionally are rapidly changing with the advanced web technologies in recent years. These technologies transform the classical Web into an interactive, dynamic platform and form a new trend in web developing and web designing. Thus, computer users find themselves in a new genera- tion of the Web. The term “Web 2.0” is used to define this new form of the digital world. Today, the popularity of Web 2.0 and the development of new web applications continue to improve at a rapid rate. There are many sophisticated Web 2.0 ap- plications that provide collaborative working or social networking platforms for computer users. Web 2.0 technologies also can be used to create personal and interactive technologies or applica- tions. Blogs, wikis, file sharing sites and podcast- ABsTRAcT Web 2.0 is the second face of World Wide Web with its revolutionary features and technologies. Web 2.0 takes users to a dynamic environment, where they can build or control more personal, social and lexible web contents. These functions attract educators’ attention and enable them to use Web 2.0 technologies in E-Learning activities. As a result of using Web 2.0 technologies, a new generation learning form: E-Learning 2.0 comes to life. This chapter will discuss the roles of Web 2.0 in E-Learning, analyze free and open source E-Learning 2.0 applications, and discuss the future of the Web. The features of Web 2.0 and its popular technologies will be explained irst. Later, the roles of Web 2.0 technologies in E-Learning activities and E-Learning 2.0 will be discussed. Following that, free and open source E-Learning 2.0 applications will be analyzed. At last, new generations within the future, Web 3.0 and Web 4.0 will be discussed. DOI: 10.4018/978-1-61520-917-0.ch001