Varnish

Varnish Cache is a web application accelerator also famous 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 really, really fast and will boost your web site's speed. One of the major virtues of Varnish Cache is the flexibility of its principal configuration mechanism, VCL, which permits you to choose how incoming requests should be handled.

Memcached

Memcached is a generic distributed memory object caching system for boosting the loading speed of dynamic database-driven web sites. It is used to reduce 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 memory object caching system uses a client'server architecture. The Memcached distributed memory object caching system is employed by some of the most traffic-hungry websites on the World Wide Web and is supported by popular web apps like Joomla and WordPress.

Node.js

Node.js is a software system for building scalable Internet apps. Built on Chrome's JavaScript runtime, Node.js uses an event-driven, asynchronous I/O model that makes it lightweight and efficient, suitable for high-performance data-heavy network 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 database management system. A database engine is the principal software component that a database management system uses to create, read, modify and delete data from a database. Its latest version offers substantial improvements in performance, security and functionality. InnoDB provides the standard ACID-compliant transaction attributes, along with foreign key support. It is included by default in most binary distributions from MySQL AB.