FingerprintJS is a browser fingerprinting library that queries browser attributes and computes a hashed visitor identifier from them.
Google Tag Manager is a tag management system (TMS) that allows you to quickly and easily update measurement codes and related code fragments collectively known as tags on your website or mobile app.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
OneSignal is a customer engagement messaging solution.
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.
Yii is an open-source, object-oriented, component-based MVC PHP web application framework.