1C-Bitrix is a system of web project management, universal software for the creation, support and successful development of corporate websites and online stores.
cdnjs is a free distributed JS library delivery service.
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.
reCAPTCHA is a free service from Google that helps protect websites from spam and abuse.
Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results.