Adore SIP Client (iPhone) is designed specifically to leverage the iPhone's unique capabilities and easy way to make a iPhone VoIP call by using iPhone devices. Featuring a comfortable and simple user interface iPhone sip client lets you connect your iPhone to standard landline or mobile phones
Talk, chat & tweet on fring and other favorite social services including Skype, MSN Messenger, GoogleTalk, Twitter, Yahoo!, ICQ, AIM, all through one central profile, using your iPhone and iPod touch's internet capability
Google Voice (iPhone) - Access your Google Voice account right from your iPhone.
Receive push notifications for new text or voicemail messages.
Send free text messages to U.S. numbers and make international calls at cheap rates.
Listen to your voicemail, read transcripts and manage your Google Voice inbox.
Display your Google Voice number as caller ID when making calls
Voypi for iPhone - Don't you wish that your phone calls and text messages were absolutely free? With Voypi you can call or text to other Voypi users anywhere in the world absolutely free. No ads. No catch.
Voypi is super easy to use. It works with your phone's contact list so you won't need to change anything in the way you call or text friends
FriendCaller 3 Pro - Make free worldwide calls over Voice over IP or use text messages. FriendCaller to FriendCaller calls are absolutely easy and free. Just use your Facebook ID or email address to talk to all your friends instantly. There is no need to register for them
FriendCaller 3 - Make free worldwide calls over Voice over IP or use text messages. FriendCaller to FriendCaller calls are absolutely easy and free. Just use your Facebook ID or email address to talk to all your friends instantly. There is no need to register for them
Truphone keeps you in touch with all your friends with FREE Wi-Fi to Wi-Fi calls, instant messaging, and great savings on international calls to mobiles and landlines anywhere in the world.
There are no contracts with Truphone
3CXPhone for Phone System v11 (iPhone/iPad) - 3CXPhone is a SIP client for the 3CX Phone System that allows you to make and receive VoIP calls from your iPhone, iPad or iPod touch. Calls are made over the internet instead of the mobile network, saving on costs
UppTalk for iPhone - UppTalk allows you to keep in touch with all your friends anytime, anywhere. With it, you can make free calls, send free SMS and chat for free from your mobile phone.
Whenever you are called or you receive SMS to your UppTalk number, and when you install the app or invite friends, you receive Energy
Voxofon for iPhone/iPad - Voxofon is a mobile app that allows you to connect with all your friends and family anywhere in the world using your iPhone, iPad or iPod touch. With it, you can make voice calls and send messages for free to any other user who has the app installed
