We require someone to write three simple PHP applications, running through a Web interface. These are a mortgage calculator, a currency converter and a metric converter. We have developed a basic HTML-only front-end, and need someone to write the PHP back-end to do the calculations. Note that the currency converter will need to consume a web service to get the most up-to-date exchange rates. Go to http://tagg.ws to see our layout pages. It should be clear from that what is required - we need each of the three pages to 'work'.