Embracing inapt infrastructure technology is a major threat in developing extensive and efficient Web-based systems. The architectural strength of all business models demands an effective integration of various technological components. And middleware, the center of all applications, becomes the driver—everything works if middleware does. In the recent times, the client/server environment has experienced sweeping transformation and led to the notion of the “Object Web”. Web browser is viewed as a universal client that is capable of shifting flawlessly and effortlessly between various applications over the Net. This paper presents an overview of middleware and the facilitating technologies and point toward the latest developments, taking into account the functional potential of the on-market middleware solutions as well as their technical strengths and weaknesses. The paper classifies and describes various types of middleware technologies such as database middleware, Remote Procedure Call (RPC), application server middleware, message-oriented middleware (MOM), Object Request Broker (ORB), transaction-processing monitors, and Web middleware etc., with on-market technologies.