I am aware only of a testing and development framework based on Linux

http://www.litmus-rt.org/

If you find other simulators plese share the information. 

Thank you!

Thankyou Cristina ..

Try multi2sim for Linux (ubunto)

Or

NetLogo Simulator

Thank You Nizar Alhafez

You can try RTsim (www.dcce.ibilce.unesp.br/spd), which is developed in our group. It is GUI based and has some native schedulers and an interface where you can provide an algebraic formulation (simple arithmetic only) for a new scheduler. It demands an update Java kit in order to compile the formulation into Java code for simulation.

ok i will try Aleardo Manacero .Thank you

Don't be afraid to ask for help or communicate any problem.

Aleardo