The Windows Phone app, which has gone free next as myAppFree app of the day is Ringo: Low cost international calling.
Ringo a great calling app that lets you make low cost international calls to any mobile or phone number anywhere in the world and you can make good old high quality calls without using the internet.
* Lowest Pricing – 25% cheaper than other apps
* Ringo converts your international calls to good old high quality local calls
* You don’t need the internet to make phone calls.
* No call drops or choppy voice.
* Friends don’t need to download the app for you to call them
* No monthly commitment – you pay-as-you-go
* Earn free credits by inviting friends to download Ringo. Your friend earns free credit too.