can u suggest any good site that wil help us to make call

Have you heard of "shutter", I have used it to call my friends and family. And of course it is free. It is especially designed for students in our country. If you like to use, you can make a registration to get an account number. Here is the site: http://shutter.cdream.com/register.php?linkid=82049

try skype, thats what i am using and its good.

You could also use Yahoo Messenger in making calls...for free.

Download skype. If you want to keep skype free, make up multiple accounts so you won't have to buy any skype credits. :D