Fring Beta v1.1.0.1 (Freeware)
Requirements: Android 1.5 or Higher
Overview : Fring is a mobile internet service and community that allows users to access and interact with a variety of communication services such as Skype®, MSN® Messenger, Google Talk™, ICQ, SIP, Twitter, Yahoo!™ and AIM®. Through fring, you can send and receive calls as well as message all of your contacts all will using your cellular data plan or a WiFi connection rather than use your minutes. You can even make affordable local and international calls to landline and regular cellular numbers using your SkypeOut/SkypeIn account or almost any VoIP service.

Personal Overview- The only free voip voice calls over the internet, excellent app i've been using for 2 days, skype , msn and other voice calling is working perfectly, its still beta so the interface isnt that great but does the job. Much better and easier than anything available at the moment
More Info:Code:
http://www.androlib.com/android.application.com-fring-xmnt.aspx
Download Instructions:http://www.mediafire.com/?mlzmhnidogo