Varnish

Varnish Cache is a web application accelerator also known as a caching HTTP reverse proxy. You can install it in front of any server that speaks the HTTP protocol and configure it to cache the content. Varnish Cache is very, very fast and will make your web site load much faster. One of the major features of Varnish Cache is the flexibility of its principal configuration mechanism, VCL, which allows you to determine how incoming requests should be dealt with.

Memcached

Memcached is a general-purpose memory caching system for increasing the load speed of dynamic database-powered web sites. It is used to reduce the number of times an external data source (such as a DB or API) is read by caching data and objects in RAM. The Memcached memory object caching system uses a client/server architecture. The Memcached distributed memory object caching system is employed by some of the most regularly visited websites on the World Wide Web and is supported by famous Content Management Systems like Joomla and WordPress.

Node.js

Node.js is a software system for building highly scalable network applications. Built on Chrome's JavaScript runtime, Node.js uses an event-based, asynchronous I/O model that makes it lightweight and efficient, suitable for high-performance content-heavy Internet applications. Node.js uses Google's V8 JavaScript engine, libUV, and a number of in-built libraries.

InnoDB

InnoDB is the default storage engine for the MySQL open-source relational database management system. A database engine is the main software component that a database management system uses to create, read, modify and delete data from a database. The latest release of InnoDB offers substantial improvements in efficacy, dependability and functionality. InnoDB offers the standard ACID-compliant database transaction attributes, as well as foreign key support. InnoDB is included as standard in most binary distributions from MySQL AB.