PHP
PHP is a powerful tool that allows for processing that may look complex but actually is very simple to do. Based on PHP different simple web application can be created because usualy it does not require advanced knowledge. But at the same time latest PHP versions support a lot features which can be used to build medium and even complex business applications specially OOP supporting (I look forward supporting OOP virtual functions, may be soon it is up). Current PHP version does not look so young and every year it is more ripe language that allow to create more complex applications.Recently, increasingly referred different portable web application. This application you can keep on the usb flash drive as is or you can encrypt it with some encryption portable tool and decrypt before using. PHP with Apache and MySQL allows create portable application, you just plug in to some computer and run it.
Vitana's PHP team develops and delivers comprehensive solutions utilizing the full range of PHP applications and PHP portable applications.