barablu - Barablu lets you make free VoIP calls to other barablu contacts using your phone's WiFi connection. You can also make low-cost calls and send cheap SMS to GSM and landline phones.
In addition, the app lets you chat with other people all over the world using popular IM services
Rynga for iPhone - Rynga 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. Calls to other Rynga users are free.
Rynga works anywhere there is a WiFi, 3G or GPRS connection available
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
VoipBuster for iPhone - VoipBuster 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.
VoipBuster works anywhere there is a 3G, WiFi, GPRS or Edge connection available
VoipDiscount for iPhone - VoipDiscount 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.
VoipDiscount works anywhere there is a 3G, WiFi, GPRS or Edge connection available
ActionVoip for iPhone - ActionVoip 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.
ActionVoip works anywhere there is a 3G, WiFi, GPRS, Edge or UMTS connection available
Jumblo for iPhone - Jumblo 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.
Jumblo works anywhere there is a 3G, WiFi, GPRS, Edge or UMTS connection available
Mobyler for iPhone - Mobyler allows you to make free calls and chat with other Mobyler 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 device. You can also make cheap calls to non-Mobyler contacts
Get the Vonage Mobile app and start making unlimited calls in the U.S. and to over 60 countries around the world with the Vonage World Mobile plan - all for only $24.99 per month(*).
The Vonage Mobile application enables you to use both cellular and Wi-Fi to make low-cost international calls with no special codes or PINs and it uses your existing contacts
FriendCaller for iPhone - 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