Varnish

Varnish Cache is a web application accelerator also famous as an HTTP accelerator. You can install it in front of any server that speaks the HTTP protocol and configure it to cache the contents. Varnish Cache is very, very fast and will improve the speed of your web site. One of the important features of Varnish Cache is the flexibility of its configuration language, VCL, which allows you to define how incoming requests should be tackled.

Memcached

Memcached is a generic memory caching system for boosting the load speed of dynamic database-powered websites. 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 system is used by some of the most traffic-hungry 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 writing scalable network applications. Built on Chrome's JavaScript runtime, Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient, perfect for real-time data-intensive network applications. Node.js uses Google's V8 JavaScript engine, libUV, and a number of built-in libraries.

InnoDB

InnoDB is the default database engine for the MySQL open-source DBMS. A database engine is the primary software component that a DBMS uses to create, retrieve, modify and delete data from a database. Its latest edition features significant improvements in efficiency, dependability and usability. InnoDB offers the standard ACID database transaction attributes, along with referential integrity support. InnoDB is included by default in most binary distributions from MySQL AB.