Varnish

Varnish Cache is a web application accelerator also popular 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 really, really fast and will boost your web site’s loading speed. One of the chief features of Varnish Cache is the flexibility of its configuration language, VCL, which permits you to choose how incoming requests should be handled.

Memcached

Memcached is a general-purpose memory caching system for increasing the loading speed of dynamic database-driven web sites. It is used to decrease 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 memory object caching system uses a client’server architecture. The Memcached memory caching system is employed by some of the most traffic-hungry web sites on the web and is supported by famous web applications like Joomla and WordPress.

Node.js

Node.js is a software platform for building highly scalable network applications. Written in JavaScript, Node.js uses an event-driven, asynchronous I/O model that makes it lightweight and effective, great for high-performance content-rich network 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 database management system. A storage engine is the principal software component that a DBMS uses to create, retrieve, update and delete data from a database. The latest edition of InnoDB offers serious improvements in efficiency, stability and functionality. InnoDB offers the standard ACID transaction attributes, as well as referential integrity support. It is included as standard in most binaries distributed by MySQL AB.