WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture and a template system, referred to within WordPress as Themes.

Nextcloud is a suite of client-server software for creating and using file hosting services. Nextcloud is free and open-source, which means that anyone is allowed to install and operate it on their own private server devices.

GitLab is a web-based DevOps lifecycle tool that provides a Git-repository manager providing wiki, issue-tracking and continuous integration and deployment pipeline features, using an open-source license, developed by GitLab Inc.

MySQL is in-memory data structure store, used as a distributed, in-memory key–value database, cache and message broker. It supports different kinds of abstract data structures like sorted sets, HyperLogLogs, bitmaps, strings, lists, maps, sets, streams, and spatial indexes

Redis is in-memory data structure store, used as a distributed, in-memory key–value database, cache and message broker. It supports different kinds of abstract data structures like sorted sets, HyperLogLogs, bitmaps, strings, lists, maps, sets, streams, and spatial indexes

MediaWiki is a free and open-source collaboration and documentation platform. It helps user to collect and organize knowledge and make it available to people

Elasticsearch is a search engine which is based on the Lucene library. It provides a schema-free JSON documents and full-text search engine with an HTTP web interface

Jenkins is a free and open source automation server. It helps automate the parts of software development related to building, testing, and deploying, facilitating continuous integration and continuous delivery. It is a server-based system that runs in servlet containers such as Apache Tomcat.

Drupal is a free and open-source web content management framework written in PHP and distributed under the GNU General Public License. Drupal provides a back-end framework for at least 2.3% of all websites worldwide – ranging from personal blogs to corporate, political, and government sites.

Rabbitmq is an open-source message-broker software (also called message-oriented middleware) which implemented the Advanced Message Queuing Protocol and was extended with a plug-in architecture to support Streaming Text Oriented Messaging Protocol, MQ Telemetry Transport, and other protocols. Server program is written in the Erlang programming language and is built on the Open Telecom Platform framework for clustering and failover. Broker interface with cleint libraries are available for all leading programming languages

PostgreSQL (also known as Postgres), is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance. PostgreSQL features transactions with (ACID) properties - Atomicity, Consistency, Isolation, Durability, automatically updatable views, materialized views, triggers, foreign keys, and stored procedures. It is designed to handle a wide range of jobs, from single machines to data warehouses or Web services with many concurrent users.

DokuWiki is a wiki application written in the PHP programming language. It operates on plain text files and does not need a database

Joomla is a free and open-source content management system for publishing web content, developed by Open Source Matters, Inc. It is built on a model–view–controller web application framework that can be used independently of the CMS.

Ghost is a free and open source blogging platform written in JavaScript, it is designed to simplify the process of online publishing for both individual bloggers and online publications

Hasura is a privately held software technology company that builds developer tooling products, including open source tools, backend as a service and platform as a service products. The Hasura GraphQL Engine provides GraphQL APIs over new or existing Postgres databases.

Matomo is a free and open source web analytics application that runs on a PHP/MySQL webserver. It tracks online visits to websites and those visits are used in analysis for reports creation

Rocket.Chat is a free and open source team chat platform. It is designed for team collaboration and customer engagement

Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, facebook, twitter, chat and e-mails.