What is the best way to make free phone calls from an iPod touch?

I want to be able to make free phone calls from an iPod touch. I've used Google Voice for my computer, but it doesn't work for an iPod touch. How should I go about doing this?


These are the ones that I mostly use, in order of relevance:

  • Viber
  • Skype
  • Tango

Nimbuzz

Nimbuzz to Nimbuzz

Free (video) calls (over 3G, 4G and WiFi) for iPhone to iPhone and iPhone to PC.

Connect with any SIP

You can connect to any SIP provider. Get your own cheap provider for VoIP calls and connect it with Nimbuzz.

Nimbuzz also connects with:

  • Yahoo! Messenger
  • MSN Messenger
  • AIM
  • ICQ
  • GoogleTalk
  • Facebook
  • MySpace
  • Hyves