Bria for iPad is a SIP-based phone specifically designed for iPad that uses a Wi-Fi or 3G/4G connection to make and receive calls.
Bria facilitates easy communication with an intuitive interface that includes all of the standard phone features such as call display, call history, voicemail indicator and multiple call support
fring gives you FREE Video Calls, voice calls & chat to friends over 3G and WiFi (Video calls only on capable devices).
Communicate with friends in the fring network and other supported services: MSN Messenger, GTalk, Twitter, SIP, Yahoo!, AIM & ICQ
Start a group, add your friends, and we’ll give you a free phone number for it. GroupMe is the easiest way to start conversations and keep in touch with your real life network. It's totally free, and it works on every phone
Bria for Android Phones - Bria is a powerful VoIP softphone for Android phones. It uses a 3G or WiFi connection to make and receive calls.
Bria offers superior audio quality with the included G.711, G.722, GSM, iLBC and SILK codecs
yuilop for iPhone - Yuilop 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 yuilop number, and when you install the app or invite friends, you receive Energy
MobileVOIP is a free iPhone calling app which lets you make (free) national or international voip calls directly from your iPhone. You can save on your Mobile Phone costs by simply installing the MobileVoip app. Select any contact from your contact list which is accessible in the app and start your call using MobileVoip anywhere, anytime
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