1C-Bitrix is a system of web project management, universal software for the creation, support and successful development of corporate websites and online stores.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
JivoChat is a live chat solution for websites offering customizable web and mobile chat widgets.
Open Graph is a protocol that is used to integrate any web page into the social graph.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
VK is a Russian online social media and social networking service.