Date Added: Mar 2013
The increasing demand for more computing power and data storage capacity in many fields of business, research, engineering, medical and science has raised the emergence of Grid Computing. Grid computing facilitates the environment where computers are interconnected with each other in such a manner that for making the execution faster of their tasks they can utilize the unused processing power of other idle systems. The applications of grid demand the secure access to the computational resources in the distributed environment. The secure and uniform access to resources is provided by Grid Middleware. In this paper, the author has presented some of the middleware and Toolkits having some advantages and disadvantages.