Friendcaller is a browser based system for making voip calls, which means there is no software to download, simply call directly from your browser page. The system is a Java applet which works on all platforms and you can call all countries. There is also a software download called FriendCaller 3 Pro for the iPhone and iPod Touch.

DialaCode is a service for making cheap international calls from the UK with your mobile phone. It works with T-Mobile, Orange and 3 mobile networks. The cost for making an international phone call starts at 3p a minute, and there are no other added charges. There are over 400 countries available to call including Spain, France, India and the USA.

Truphone Mobile Voip is an application for mobile phones that lets you call other Truphone users, and Skype and Google Talk users, for free over a wi-fi network. It also gives cheap international call rates, and when abroad you can avoid expensive roaming charges by accessing a wi-fi network. The software works worldwide, whatever country you’re in, and turns your iPod Touch into a phone.

1-800-Free411 give free long distance calls and free international phone calls to continental USA residents. The calls have a limit of 5 minutes, but there is no limit to the number of calls you can make. The service is simple to use – dial 1-800-free411 (1-800-373-3411) and then listen to the instructions – select ‘free call’ then enter your international or long distance phone number.

Localphone give cheap international calls from landlines and mobiles worldwide. You are allocated a local number for every person you call which can be stored in your phone making dialling very easy. Rates are very competitive, and popular destinations include India, Pakistan, Australia, UK, US, China and UAE.

Lebara Mobile is a pay-as-you-go mobile service for the UK that gives a cheap flat rate for national calls and very cheap international call rates. You need to purchase the Lebara mobile starter pack (stockists are listed on the Lebara website) which comes with a pay-as-you-go SIM card and a credit voucher for the Lebara network.

Call for Free is an Australian service which lets you make free international calls using the free minutes in your mobile phone package and you can call cheaply from your landline phone. You can make cheap or free calls to 70 different countries by using an access number directly from your phone. The only cost is for the connection to the CallForFree number.