All components developed as part of the GridSim Toolkit are released as "open source" under the GPL license to encourage innovation and pass full freedom to the users. In addition, the Gridbus team has decided to use

SourceForge for hosting its future releases and developments. This allows the team to share and to collaborate further on new functionalities. Therefore, contributions to the GridSim Toolkit are greatly appreciated.

The early version of the GridSim toolkit has been used/dowloaded by several academic and commercial organisations around the world including the University of Southern California (USA), California Institute of Technology (USA), Argonne National Labs (USA), University of Manchester (UK), CERN, Universidad de Santiago de Compostela (Spain), Indian Institute of Technology, Tsinghua University (China), Sun Microsystems, IBM Research, Unisys, HP, Northrop Grumman Information Technology, British Telecom, and EMC Corp.

The GridSim software has been used for modelling and simulating many interesting systems and ideas. For example, IBM Research uses our DataGrid package to simulate a Grid meta-scheduler that tightly integrates

the compute and data transfer times of each job. Another example is Universidad de Santiago de Compostela's extension of GridSim to optimize execution of parallel applications on a Grid. The team's own uses include simulating economic Grid scheduler in a competitive economy model, economic based cluster scheduler and cooperative Grid federation.

The contributors to the GridSim software (from early to new version) are:

• Rajkumar Buyya, GRIDS Lab, The University of Melbourne.
• Manzur Murshed, GSCIT, Monash University, Australia.
• Anthony Sulistio, GRIDS Lab, The University of Melbourne.
• Gokul Poduval and Chen-Khong Tham, Dept. of Electrical & Computer Engineering, National University of Singapore.
• Marcos Dias de Assuncao, GRIDS Lab, The University of Melbourne.
• Uros Cibej and Borut Robic, Faculty of Computer and Information Service, The University of Ljubljana, Slovenia.
• Agustin Caminero, Department of Computing Systems, Universidad de Castilla La Mancha (UCLM), Spain.

To download the GridSim software, you can visit the Gridbus Project web site at http://www.gridbus.org/gridsim/