Disqus is a worldwide blog comment hosting service for web sites and online communities that use a networked platform.
Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising.
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.
Webnode is a drag-and-drop online website builder.