Varnish

Varnish Cache is a web accelerator also called 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 loading speed of your web site. One of the essential merits of Varnish Cache is the flexibility of its domain-specific language, VCL, which permits you to specify how incoming requests should be tackled.

Memcached

Memcached is a general-purpose memory caching system for increasing the load speed of dynamic database-driven websites. It is used to reduce 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 caching system uses a client'server architecture. The Memcached distributed memory caching system is used by some of the most regularly visited sites on the World Wide Web and is supported by famous CMSs like Joomla and WordPress.

Node.js

Node.js is a software platform for writing scalable network applications. Built on Chrome's JavaScript runtime, Node.js uses an event-based, asynchronous input/output model that makes it lightweight and efficient, ideal for high-performance content-heavy applications. Node.js uses Google's V8 JavaScript engine, libUV, and several built-in libraries.

InnoDB

InnoDB is the default storage engine for the MySQL open-source relational database management system. A database engine is the principal software component that a DBMS uses to create, read, modify and delete data from a database. Its latest edition features substantial improvements in performance, dependability and usability. InnoDB offers the standard ACID-compliant database transaction properties, as well as declarative referential integrity support. InnoDB is included by default in most binaries distributed by MySQL AB.