Varnish

Varnish Cache is a web application accelerator also referred to as an HTTP accelerator. You can install it in front of any web server that speaks the HTTP protocol and configure it to cache the content. Varnish Cache is very, very fast and will increase the speed of your site. One of the main strengths of Varnish Cache is the flexibility of its configuration language, VCL, which enables you to choose how incoming requests should be dealt with.

Memcached

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

Node.js

Node.js is a software system for writing scalable Internet apps. Written in JavaScript, Node.js uses an event-based, non-blocking input/output model that makes it lightweight and effective, ideal for real-time data-heavy applications. Node.js uses Google's V8 JavaScript engine, libUV, and several in-built libraries.

InnoDB

InnoDB is the default storage engine for the MySQL open-source RDBMS. A storage engine is the principal software component that a database management system uses to create, read, modify and delete data from a database. The latest version of InnoDB features serious improvements in efficacy, reliability and usability. InnoDB provides the standard ACID-compliant transaction properties, along with foreign key support. It is included by default in most binaries distributed by MySQL AB.