sipgate brings VoIP to your iPhone
http://www.sipgate.com

You can benefit from all the great features SIP brings into the game.
You can:
save mobile minutes, whenever Wi-Fi is available
bypass roaming charges
place calls at virtually no cost when travelling abroad, etc.
free 111 minutes included
free support for 3rd party VoIP services
absolutely no charges for anything
Understand that none of these features are provided by sipgate. You need to purchase a SIP service and a Wi-Fi connection from third parties in order to enjoy them. Just log in at http://www.sipgate.com and set up your account to forward calls to and from your favorite VoIP service.
With the sipgate service, users can dial any number without using minutes from a wireless plan. This is particularly useful when calling to or from other countries, as call costs can be as high as $3 per minute. However, when using a VoIP service, costs can be kept as low as $0.01 per minute. sipgate is giving new users 111 free minutes for domestic calls for users to test out VoIP usage on the device.
Another benefit of sipgate is that consumers can use any domestic or international number provided by their VoIP service on their iPhone. This means that they can make and receive calls from different domestic and international numbers, all on a single device.
Thilo Salmon, CEO of sipgate commented: "We love VoIP and we love the iPhone so we are giving people like us who always wanted VoIP on the iPhone the ability to use any SIP-based VoIP service they want. We are thrilled that Apple is opening up the iPhone and we look forward to taking part in future application development."
Salmon continued: "As a company we strive to make useful services accessible to everyone. There will be more innovation for businesses and consumers coming from sipgate this year, so keep your eyes open for more news."
System requirements:
In order to use the sipgate iPhone client it's recommended that you update your iPhone's firmware to v1.1.4.

The software is 100% standard compliant and is not tied to any particular SIP service. You can use it with any SIP service you like. And it is 100% free.
Charges from third parties for Wi-Fi or VoIP subscriptions may apply
sipgate Inc. ( http://www.sipgate.com ) announces the immediate availability of a free application for the iPhone, which, for the first time allows consumers to natively use any VoIP service which uses the industry standard SIP. Consumers can now use their iPhones to make and receive VoIP calls from their devices over a Wi-Fi Internet connection using a wide variety of VoIP providers. The VoIP-enabling software is available from sipgate's website:
http://www.sipgate.com
