Varnish

Varnish Cache is a web application accelerator also referred to as a caching HTTP reverse proxy. You can install it in front of any server that speaks HTTP and configure it to cache the content. Varnish Cache is really, really fast and will improve the speed of your web site. One of the essential features of Varnish Cache is the flexibility of its configuration language, VCL, which enables you to determine how incoming requests should be tackled.

Memcached

Memcached is a general-purpose distributed memory object caching system for boosting the load speed of dynamic database-powered websites. It is used to lower 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 object caching system uses a client'server architecture. The Memcached memory caching system is used by some of the most traffic-intensive websites on the World Wide Web and is supported by popular CMSs like Joomla and WordPress.

Node.js

Node.js is a platform for building highly scalable network apps. Built on Chrome's JavaScript runtime, Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and effective, suitable 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 database engine for the MySQL open-source relational database management system. A database engine is the underlying software component that a database management system uses to create, retrieve, modify and delete data from a database. The latest version of InnoDB features serious improvements in efficacy, dependability and usability. InnoDB provides the standard ACID database transaction attributes, as well as foreign key support. InnoDB is included as standard in most binary distributions from MySQL AB.