
Viber provides a way for iPhone users to make free VoIP calls to other iPhone users using Wi-Fi or 3G connections.

There’s an app that you can download to use on your iOS device. The rates for outgoing calls are not bad either. Taking a page out of Google’s book, the service also offers one number to use anywhere. Features include phone IM, SMS, video chat, phone calls and fax. VoxOx has a unique selling position (USP) in that they provide an all-inclusive solution for desktop and mobile devices. One advantage that Vbuzzer has over Skype is the lower rate charged for calls.

With it, you’ll get free PC-to-PC calls, low cost PC to phone calls, caller ID, fax, web conferencing, call forwarding, and voicemail. This service provides VoIP and IM through open protocols. The service also includes standard features like voicemail, call screening, transcript of voicemail messages, SMS and conference calls. If you’re in the US, you can get a number that can be used to ring any phone of your choice. Some of the main highlights of Google Voice include free PC-to-PC video and voice calls, free calls from PC to phones in the US, and cheap international calls.

Google Voice is yet another service offered by the number one search engine. For both benefits plus tons of extras stick with Skype, but if you’re ready to bail because you’re worried about the implications of Microsoft buying Skype you can check out the alternatives listed below. Still, it’s possible to find companies like Nirvanix that excel at offering great VoIP or video calling as individual services. There’s no single provider that can match Skype’s service feature for feature.
