Windows Phone 7 app marketplace is growing with good number of applications. One of the useful ones is Voxofone which allows you to call any Skype or Gtalk contact from your phone. It is a free VOIP App that allows users to call Call Skype, GTalk and more from their WP7 device. It does not require any WiFi connection, but works where there is proper signal coverage for phone.

After you complete a free sign up you are given USD $0.50 credit to try out the services and the app is available for download from Windows Phone 7 marketplace. Click on the image below to download the app.