Here is Top 5 Application to make Free calls for Iphone or Ipod Touch....

1) iCall

Our top pick is iCall. It is an amazing iPhone app that really changes the way you make phone calls. It works over anywi-fi network, anywhere in the world, either you have access to an operator’s network or not. iCall is a free app so you don’t even need to worry about one time payment. It lets you make free calls and send SMS to any network within USA and Canada. Though international calling is not free, it is very much affordable.

2) Fring

Fring is a famous VoIP app which is available for iPhone too. It not only lets you to make free calls to other Fring users but also to Skype and IM contacts. Calling to local and international landline and cellular networks is very much affordable.

Fring is a networking hub available free on the iTunes store with a lot more features.

3) Skype

Skype lets you make free calls to other Skype users anywhere in the world. It works over your existing GPRS, 3G orwi-fi network.

Same like Fring, calling to local and international landline and cellphone numbers is very much affordable. Skype is a free app.

4) Truphone

Calls to Truphone, Skype and gtalk users is free. Local and international landline and cellphone calls can be made at cheap rates. Truephone is also a free app.

5) Vopium

Vopium is a free iPhone app which has an advantage over others that you can make 30 minute free calls and send 30 SMSs to any local and international number on your first subscription. The subscription is totally free. You can also make free calls to other Truphone, Skype and gtalk users. After, you cross the limit of 30, you can call and text at affordable rates.  Vopium is a free app available at the iTunes store.