Varnish

Varnish Cache is a web application accelerator also famous 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 really, really fast and will improve the speed of your website. One of the important advantages of Varnish Cache is the flexibility of its principal configuration mechanism, VCL, which permits you to choose how incoming requests should be tackled.

Memcached

Memcached is a generic memory caching system for speeding up dynamic database-driven web 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 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 popular Content Management Systems like Joomla and WordPress.

Node.js

Node.js is a software system for building scalable Internet applications. Written in JavaScript, Node.js uses an event-driven, asynchronous input/output model that makes it lightweight and efficient, great for high-performance content-intensive apps. Node.js uses Google's V8 JavaScript engine, libUV, and a number of in-built libraries.

InnoDB

InnoDB is the default database 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 substantial improvements in performance, stability and functionality. InnoDB provides the standard ACID transaction attributes, as well as referential integrity support. It is included by default in most binary distributions from MySQL AB.