The leading open source web analytics platform. Piwik gives you insights on your website's visitors, your marketing campaigns and much more, so you can optimize your strategy and online experience of your visitors.
HHVM is an open-source virtual machine designed for executing programs written in Hack and PHP. HHVM uses a just-in-time (JIT) compilation approach to achieve superior performance while maintaining the development flexibility that PHP provides.
PHP is a general-purpose server-side scripting language originally designed for Web development to produce dynamic Web pages. Popular development frameworks include CakePHP, Zend, Symfony, and CodeIgniter.