BoltWire CMS is an open-source content management system that runs on PHP – it’s easy-to-install, and comes with many features. While BoltWire CMS offers features that might not be as advanced as other PHP-based CMSes such as WordPress, Joomla, or Drupal, BoltWire can help you create personal or business websites in minutes just by uploading its content to your server. It also doesn’t require any databases, which makes it lighter and faster.
The installation is quite simple. If you follow our instructions carefully, you can finish installing BoltWire CMS on your Debian 9 VPS in less than 10 minutes. Let’s get started.
In this tutorial, we will show you how to install Mezzanine on 
In this tutorial, we will show you how to install NodeBB on Debian 9, NodeBB is a free and open-source discussion platform that utilizes web sockets for instant interactions and real-time notifications. Powered by Node.js, NodeBB is fast, simple, and easy-to-use. It has lots of features, such as social network integration and streaming discussions. 
The 
RainLoop is a free and open-source webmail application written in PHP. As an alternative to other popular webmail applications like RoundCube and SquirrelMail, RainLoop is a complete webmail solution – it is a simple and modern, yet very powerful and flexible at the same time. RainLoop webmail has a built-in caching mechanism, which improves the overall performance of the application while also reducing the load on both the web server and the mail server.
Kafka or Apache Kafka is a distributed messaging system based on the principle of the pub-sub (publish-subscribe) model. It allows us to publish and subscribe to a stream of records that can be categorized. It is an incredibly fast, highly scalable, fault-tolerant system, and it’s designed to process large amounts of data in real time. Apache Kafka can be used as an alternative to a message broker as well, which allows us to process/transform a stream of records. Kafka can be used as a messaging system, but in a rather incomparably huge scale. Overall, Apache Kafka is a very powerful tool when used correctly.
Additionally, Open Web Analytics has built-in support for tracking websites that are created with popular content management systems, such as WordPress and MediaWiki.