Free Software for Self-Hosted
Drupal
Drupal is a free and open-source CMS written in PHP. Drupal is used for creating website for businesses, political parties and governments. The CMS currently powers 2% of all websites on the internet.
Batflat
Batflat is fast, database-less CMS written in PHP. Batflat weighs in on 1024 kilobytes and it has all features you have come to enjoy from other content management systems like WordPress. You can also download or create your own extensions for Batflat, allowing you to build features on top of the core and create unique experiences for the end-user.
Hugo
Hugo is one of the most popular open-source static site generators. With its amazing speed and flexibility, Hugo makes building websites fun again. Hugo is the fastest tool of its kind, it generates pages at <1 ms per page, the average site builds in less than a second. Hugo also supports unlimited content types, taxonomies, menus, dynamic API-driven content, and more, all without plugins. Hugo is written in Go and released fully free and open-source under the Apache-2.0 License.
Superdesk
Superdesk is a state-of-the-art digital newsroom system that combines headless CMS functionality with powerful workflow features for an end-to-end news creation, production, curation and distribution platform. With Superdesk you can create and distribute content to any platform. All within a web-based dashboard that share many similarities with a regular newsroom, while providing remote-friendly workflows that will make journalist feel right at home.
WP-CRM
WP-CRM provides a unique customer relations management system that seamlessly integrated into your WordPress control panel. With WP-CRM you can easily manage and store your customers and prospects’ information in your WordPress administrantion panel and MySQL database, giving you the ability of utilizing the vast pool of WordPress plugins to collect, analyze and work with user information.
PyPlate
PyPlate is a Python-based content management system that is perfect for building smaller websites quickly. PyPlate comes with built-in widgets for navigation and breadcrumbs and includes features for backup and restoring data with ease.
RxDB
RxDB is short for Reactive Database and is a NoSQL-database for JavaScript Applications like Websites, hybrid Apps, Electron-Apps, Progressive Web Apps and NodeJs. Reactive means that you can not only query the current state, but subscribe to all state changes like the result of a query or even a single field of a document. This is great for UI-based realtime applications in way that makes it easy to develop and also has great performance benefits. To replicate data between your clients and server, RxDB provides modules for realtime replication with any CouchDB compliant endpoint and also with custom GraphQL endpoints.
OrientDB
OrientDB is an open-source NoSQL database management system written in Java. The multi-model database supports graph, document, key/value, and object models, where relationships are managed as in graph databases with direct connections between records. The database is extremly efficient and can store over 220,000 records per second on common hardware, and traverse thousands of records in milisecons. OrientDB scales well on multiple machines, thanks to the multi-master replication where there is no single bottleneck on writes like with master-slave replication.
VoltDB
VoltDB is a blazingly fast NewSQL database management system that is specifically designed to run on modern scale-out architectures - fast, inexpensive servers connected via high-speed data networks. VoltDB is a popular choice for companies with high data throughput requirements, like in the telecommunications industry. 5G has changed the game for telcos, and new rules call for a new way of managing data. VoltDB is built for today’s massive data volume and complexity, allowing businesses to survive and thrive in the age of 5G, IoT, and whatever comes next.
solidDB
solidDB is a fully featured, relational in-memory database that meets the performance and reliability demands of real-time applications. There are currently millions of deployments utilizing the power of SolidDB for telecommunications networks, enterprise applications, and embedded software & systems. Market leaders such as Cisco, HP, Alcatel, Nokia and Siemens rely on solidDB for their mission-critical applications.