http://www.telephoneforless.com/ offers value for money international
telephone calls to over 230 countries from the UK.

There is no account to open, no credit card is required, there is no
connection charge and we won't send you a bill.  All you need is a phone.

You can call over 90 countries for the cost of a UK local call (4p/minute
during the week, and 5p/minute all weekend).  This includes the US, Canada,
most of Europe, Japan, Guadeloupe, China, Brazil, the Bahamas, Hong Kong,
Indonesia, and Israel.  You can call mobile (cell) phones too, many for the
same price.

http://www.telephoneforless.com/, and start saving on your international
telephone calls from the UK.