Scydo for iPhone - Scydo allows you to make free calls and chat with other Scydo users via your phone's 3G or WiFi connection. You can use the app to call all your friends and family anywhere in the world for free as long as they also have the application installed on their iPhone or Android. You can also make cheap calls to non-Scydo contacts
Skype gives you free calls and instant messages to anyone else on Skype. You can also call landlines and mobiles and send SMS anywhere in the world, at great rates. Skype is free to download and easy to use.
Free Skype-to-Skype calls
With Skype on your iPhone or iPod touch, simply sign into Skype from any WiFi zone, and call friends and family on Skype totally free
SuperVoip for iPhone - SuperVoip allows you to make cheap calls from your mobile phone. The app uses your phone's wireless connection to place the call instead of your plan minutes, saving on costs.
SuperVoip works anywhere there is a WiFi or 3G connection available
Talkatone for iPhone/iPad - Talktone is a mobile VoIP solution that complements Google Voice. You can call and text any US and Canada number for free over WiFi or 3G/4G. Talkatone doesn't use cell minutes and there are no SMS fees.
The app also lets you call and text other Talkatone users for free with better quality than other VoIP apps
textPlus Free Calls - textPlus gives you a phone number for making free and low-cost calls. Call other textPlus users anywhere in the world for free, and make cheap calls to mobile phones and landlines in the US and Canada.
In addition, the app lets you send free SMS to any US or Canadian mobile. Text messaging with other textPlus users worldwide is also free
Truphone keeps you in touch with the people that matter to you with FREE Wi-Fi & 3G calls, instant messaging, Twitter and great savings on international calls to mobiles and landlines anywhere in the world
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
Viber - Free Phone Calls is an iPhone application that lets you make free phone calls to other iPhone users that have Viber installed. When you use Viber, your phone calls to any other Viber user are free, and the sound quality is much better than a regular call. You can call any Viber user, anywhere in the world, for free
Vivox - Vivox allows you to easily keep in touch with all your friends using your iPhone or iPod touch. With it, you can make free calls and chat with contacts who also have the app installed.
Vivox can also be used to make low-cost calls to landlines and mobile phones anywhere in the world. Download and install the app to receive free calling credits
VoipAlot for iPhone - VoipAlot allows you to make cheap calls from your mobile phone. The app uses your phone's wireless connection to place the call instead of your plan minutes, saving on costs.
VoipAlot works anywhere there is a 3G, WiFi, GPRS or Edge connection available
