Skype is the classic when it comes to VoIP. It is what most people will be introduced to when they start using this type of software. Skype is well-known and therefore easy to use. Like a lot of VoIP applications, it is possible to use it on a variety of phones. You can also connect to landlines if you have the appropriate amount of credit. This is a type of service that is offered by Google through Gmail. Not directly associated with Google, it still uses the Gmail VoIP in order to make calls to other accounts. One of the great things about this is that you can use it if you have a Google Voice account as well. It can work over both wifi and 3G. There is no phone number offered with Fring, but you can call the United States for under a cent per minute. This is a somewhat solid choice for those who want a secure form of VoIP, but it can be improved. Line2 offers the same services that a lot of other VoIP providers are going to offer you. This is what makes it a good choice, especially if you want to go for something other than Skype. Even if you have a bad Internet connection there is a way of enjoying greater levels of quality. You can even call between wifi and 3G. A lot of people enjoy Truphone because it can offer you different plans. This means that you will be able to suit something that suits your own needs. With Truphone you can get a plan that will be based on how often you call. You can also get an unlimited plan if you are looking for that. It is up to how much you want to spend. Viber is probably one of the more popular forms of VoIP that is used at the moment. Using this application does not require its users to make an account of any kind as well, so this means that things are much simpler. You get minutes but these are used up if you call a person that does not have the app. Viber-to-Viber calls are going to be free. As a result of this, it is one of the most popular forms of VoIP that is out there at the moment, especially for those who own iPhones. Mariam Thomas writes about the usefulness of VoIP phone systems and its applications that are a great advantage in business communication.