1C-Bitrix is a system of web project management, universal software for the creation, support and successful development of corporate websites and online stores.
AddThis is a social bookmarking service that can be integrated into a website with the use of a web widget.
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.
PHP is a general-purpose scripting language used for web development.