I need some links for good programs to simulate my quadqopter just to give it the parameters and values virtually without connecting the hardware :)
Any suggestions :) and thank u all.
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Why would you bother unless you are building something really different? I have built and flown many multis with Arducopter for the last three years and have not had one that has not flown acceptably on default parameters. Those with latest firmwares fly really well and Autotune fines them up. It's a common experience with people I fly with too..
Software in the Loop (SITL) simulation provided by APM is a good suggestion. However, it takes time to understand the code and modified the parameters if you want to make the simulated model as close as the real one.
As mentioned by Gustav, since there are many parameters for a real drone, you cannot just input the values and playing with the simulation unless you use a popular and well proven platform.
There aren't any, sorry !
Unless it is a well proven platform, built exactly like a few hundred, if not thousands, before yours, it is an impossible task.
There are just too many variables.
The closest you can get to what you want, is to build one, fit APM or PixHawk, and run Auto Tune.
The APM uses SITL (Software in the Loop) for simulation - http://dev.ardupilot.com/wiki/sitl-simulator-software-in-the-loop/