Free Software for Self-Hosted
Temporal Workflow
Temporal Workflow is a free and open-source workflow and automation tool. With Temporal Workflow you can build and operate resilient applications using developer friendly primitives. Focus on writing business logic instead of glue code and Temporal Workflow will take care of the rest.
Seed.rs
Seed is a frontend Rust framework for creating fast and reliable web apps with an elm-like architecture. Seed provides all the benefits of Rust and macro based syntax, with a minimal overhead, configuration, and boilerplate. The framework is easy to pickup thanks to the clear documentation which is accessible to developers whether they are familiarity with Rust, or not.
NodeBB
NodeBB is an open source forum software powered by Node.js and supports either Redis, MongoDB, or a PostgreSQL database. With NodeBB you can self-host communities with instant interactions and real-time notifications powered with the help of web sockets. Thousands of organizations have also stared their communites with NodeBB SaaS product, free from self-service and maintinance.
phpBB
One of the world most popular, free, open-source and self-hosted forum software, written in PHP. With phpBB you can create communities that can be hosted with most hosting providers. The software package is built and designed from the ground up to to be extensible and provides customization option through themes and feature extensions through plugins. The extensive database of user-created extensions and styles database, easy of use, and the simple installation process has made phpBB a common choice among self-hosted forums and communities.
Nuxt.js
Nuxt.js is an intuetive Vue framework that supports generating a static website based on your Vue application. It provides the best of both worlds, as you don't need a server, yet can reap the SEO benefits. Nuxt achives this by pre-rendering all pages and include the necessary HTML. And when you are ready to deploy, Nuxt.js got you covered with simple integrations to serverless and third-party providers such as Netlify, Vercel and GitHub pages.
Docker Swarm
Docker Swarm is a container orcherstration tool based on Docker. With Docker Swarm you can manage multiple containers deployed across multiple host machines. Current versions of Docker includes swarm mode, which allows you to run Docker Engines as swarms. You can manage your Docker Swarm's with the Docker CLI, to create, deploy and manage your Docker Swarm's.
XWiki
Developed for more than 10 years, XWiki is a long standing project trusted by individuals and high profile corporations. XWiki is a free and open source Wiki software written in Java and released under the GNU Lesser General Public License. XWiki provides a WYSIWYG editing, OpenDocument based document import/export, semantic annotations and tagging, and advanced permissions management fit for enterprise use. The extensible XWiki platform allow you to customaize and improve your Wiki as the content, userbase or usecase grows and evolves.
Charts.css
Charts.css is a modern CSS data visualization framework. It utilizes CSS utility classes to style HTML elements as charts. Allowing developers to build interactive charts and data visualization components with CSS instead of JavaScript.
Let's Encrypt
Let's Encrypt is a non-profit certificate authority that provides TLS certificates for websites and web applications, free of charge. Let's Encrypt is managed by the Internet Security Research Group which operates to create a more secure web. Let's Encrypt provides an API that can be used by other internet services to provide free SSL to customers that want to host their websites over HTTPS.