The development of Web applications is moving quickly due to an explosive increase of Internet use. However, the architectures of current Web applications reveal several constraints and limitations in terms of performance, functionality, usability, etc. Several candidate technologies such as Java, Java RMI, Web-ORB, and Agents have been introduced. However, it has not been studied how these unit technologies can be put together to overcome the limitations of Web applications. As these newer language/technologies are based on the object-oriented paradigm, the object-oriented Web architectures based on these newcomers should be developed. Hence, we first identify the problems and limitations of current Web applications and then propose new architectures of and development strategies for next generation Web applications based on these newer unit technologies. Also three case studies based on the proposed architectures and strategies are presented.