Free Software for Self-Hosted
Saaze
An all-inclusive, flat-file CMS for simple and fast content management. While regular content management systems like WordPress are great, the complexity of running sush a site can easily become a burden. They also have a larger attack vector due to popularity and the fact that they utilize a relation database mangement system to serve and manage the content. Saaze is fundamentally different, the flat-file architecture of Saaze makes hosting content for the web easy to manage, secure and fast to load.
Formik
Formik is a free and open-source library for building forms with React. The library improves on the otherwise verbose process of creating forms in React by minimizing the need for repetition and eliminating the cumbersome process of keeping track of values, errors, visited fields and orchestrating validation and error handling.
Elgg
Elgg is an award-winning open source social networking engine that provides a robust framework on which to build all kinds of social environments, from a campus wide social network for your university, school or college or an internal collaborative platform for your organization through to a brand-building communications tool for your company and its clients.
Restyaboard
Restyaboard is an open source kanban board part of the Restya platform. Restyaboard can be extended using a simple Greasemonkey like approach offering offers countless way to expand--widgets, user scripts and user styles. It also provides integration and workflow automation using over 500 apps and third-party services via Zapier.
Apache HAWQ
Apache HAWQ is an open-source elastic query engine, MPP and analytical database for enterprises. Apache HAWQ combines exceptional MPP-based analytics performance, robust ANSI SQL compliance, Hadoop ecosystem integration and manageability, and flexible data-store format support.
Django
Django is a high-level Python web development framework used for building web application at scale with speed. The framework adhere to a clean and pragmatic design that lets developers develop rapidly. Django ships as a "batteries included" framework and contains many of the features needed for most web applications such as an admin panel, an ORM and templating language. It takes much of the hassle out of web development and lets developers focus on writing their application instead of focusing on authentication, authorization and security.
Grails
Grails is powerful Groovy-based web application framework for the JVM built on top of Spring Boot.
VuePress
VuePress is a free and open-source Vue-powered Static Site Generator or SSG for short. VuePress utilize the power and simplicity of Markdown files to generate content. Which allow the creator to focus on their writing, instead of formatting HTML. With VuePress, developers can harnes the power of Vue components in a simplified build step using Vue + webpack.
Nubo
Nubo is a self-hosted file sharing application that runs on macOS, Linux and Windows (64-bit versions only). The application consists of two parts, a cloud-base part which is s mall PHP application that must be installed on a server, and the client which can should be installed on your local machne to be able to syncronise and share with the cloud. In that sense Nubo is similar to other file sharing solutions in that you drop files into a special folder on your computer to save and sync with cloud instance.
Rocket.Chat
A free, unlimited and open-source chat software. Rocket.Chat have set out to be a replacement for email, HipChat & Slack and is provided as Software-as-a-Service (SaaS) or a self-hosted community edition. Rocket.Chat is feature packed and can be used for video conferencing, file sharing, voice messages and more. The software integrates with third-party services like GitHub, GitLab, JIRA, and Confluence and provides an API that can be used for authentication and integration across these services.