has emerged as a versatile cross-platform service for phone calls, instant messaging, and chat over the Web, even from an Android, iOS, or Symbian (Nokia) phone. And if your phone has a front-facing camera, you can with your Skype contacts (as long as they have a camera, too).

Earlier this month, ; how the deal might affect the service, and its pricing, remains to be seen. Currently, a basic Skype account is free, but can call only other Skype accounts. To make calls to landline phones or cell phones, you'll need a paid account, which can set you back $3 per month for unlimited calls in North America, and up to $20 per month depending on how many countries you want to be able to call. To receive calls from landlines and cell phones, you'll also need a Skype online number, which costs about $18 for three months, depending on the country code.

Although Skype gives you awesome flexibility in how and where you can make and receive calls, the piecemeal feature selection and à la carte pricing options seem needlessly complex. But for people who want an out-and-out replacement for their primary phone service, Skype is a good choice.

is an excellent service for people who want to pull all their various phone lines together under a single number. Google Voice is mainly free for U.S. customers, charging only for international calls placed with the service.

First you choose a special Google Voice phone number in any area code you prefer, and then you enter the numbers of the phones you want to associate with that number, such as your cell phone, home phone, and office phone.