1C-Bitrix is a system of web project management, universal software for the creation, support and successful development of corporate websites and online stores.
DDoS-Guard is a Russian Internet infrastructure company which provides DDoS protection, content delivery network services, and web hosting services.
Google Analytics is a free web analytics service that tracks and reports website traffic.
PHP is a general-purpose scripting language used for web development.
VK is a Russian online social media and social networking service.