Varnish

Varnish Cache is a web application accelerator also popular as a caching HTTP reverse proxy. You can install it in front of any web server that speaks HTTP and configure it to cache the contents. Varnish Cache is very, very fast and will make your web site load much faster. One of the essential strengths of Varnish Cache is the flexibility of its configuration language, VCL, which allows you to choose how incoming requests should be dealt with.

Memcached

Memcached is a general-purpose distributed memory object caching system for boosting the load speed of dynamic database-driven web sites. It is used to lower the number of times an external data source (such as a database or API) is read by caching data and objects in RAM. The Memcached distributed memory object caching system uses a client/server architecture. The Memcached memory caching system is used by some of the most traffic-heavy websites on the Internet and is supported by famous Content Management Systems like Joomla and WordPress.

Node.js

Node.js is a software platform for writing highly scalable network apps. Written in JavaScript, Node.js uses an event-driven, asynchronous I/O model that makes it lightweight and effective, perfect for real-time content-intensive network applications. Node.js uses Google's V8 JavaScript engine, libUV, and several in-built libraries.

InnoDB

InnoDB is the default database engine for the MySQL open-source relational database management system. A database engine is the underlying software component that a DBMS uses to create, read, update and delete data from a database. The latest version of InnoDB features considerable improvements in performance, dependability and functionality. InnoDB offers the standard ACID database transaction features, as well as declarative referential integrity support. InnoDB is included by default in most binary distributions from MySQL AB.