Varnish

Varnish Cache is a web application accelerator also referred to 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 increase your web site's speed. One of the major strengths of Varnish Cache is the flexibility of its principal configuration mechanism, VCL, which permits you to specify how incoming requests should be tackled.

Memcached

Memcached is a generic distributed memory caching system for boosting the load speed of dynamic database-driven 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 system uses a two-tier architecture. The Memcached distributed memory object caching system is used by some of the most traffic-intensive websites on the web and is supported by famous Content Management Systems like Joomla and WordPress.

Node.js

Node.js is a platform for building highly scalable network applications. Built on Chrome's JavaScript runtime, Node.js uses an event-driven, asynchronous I/O model that makes it lightweight and effective, excellent for high-performance data-intensive network apps. Node.js uses Google's V8 JavaScript engine, libUV, and several in-built libraries.

InnoDB

InnoDB is the default storage engine for the MySQL open-source relational database management system. A storage engine is the main software component that a DBMS uses to create, read, update and delete data from a database. Its latest version features substantial improvements in efficiency, stability and functionality. InnoDB provides the standard ACID database transaction features, along with declarative referential integrity support. It is included as standard in most binary distributions from MySQL AB.