Free Software for Self-Hosted
Jupyter
The Jupyter Notebook is an open-source web application that allows you to create and share documents that contain live code, equations, visualizations and narrative text. The Jupyter Notebook is primarily used in data science for data transformation and cleaning, numerical simulation, statistical modeling and machine learning.
LinkAce
LinkAce is a free and open-source, self hosted archive to store and organize links of your favorite websites. It allows you to host your own service where you can store links and search though them and categorize them with the helpd of tags and lists. LinkAce also provides automated backups and monitoring of your self hosted service.
GraphQL
A free and open-source data query and manipulation language for APIs, combined with a runtime for fulfilling queries with existing data. GraphQL makes it easy to understand and query your data and bridge the gap between frontend and backend web development. The project is openly developed by Facebook, and community around it.
Deno
A new free and open-source JavaScript runtime based on the V8 engine by the creator of Node.js, Ryan Dahl. Deno is written in JavaScript and Rust and allows you to write server-side application with JavaScript or TypeScript in a faster and more secure way. Ryan Dahl set out to create Deno from the ground up to remedy regrets he faced after building Node.js. Deno puts more focus on security and permission, promises, browser capability, imports and modules.
MainWP
The MainWP WordPress plugin is a free and open-source, self-hosted solution for managing multiple WordPress sites from a single dashboard. With MainWP you can manage posts and pages, controlling users, making backups and performing updates through the unified MainWP dashboard. All of which will minimize the time and cost of maintaining multiple WordPress sites.
Metabase
Metabase is an open-source tool that allow data and analytics to be shared fast and easy within a company. The open-source business intelligence server provided by Metabase can be installed within 5 minutes. Metabase can also, easily be integrated with third-pary services and databases like Amazon Redshift, Druid, Google Analytics, Google BigQuery, H2, MongoDB, MySQL, Oracle, PostgreSQL, Presto, Snowflake, SparkSQL, SQL Server, SQLite and Vertica. The software is provided free and open-source under the GNU Affero General Public License (AGPL) and managed server solutions can be purchased at a monthly subscription.
Grafana
As the world's most popular free and open source technology for visualizing metrics, Graphana makes it easy to create a interactive dashboard for data monitoring. Grafana's designed from the ground-up for analyzing and visualizing metrics such as system CPU, memory, disk and I/O utilization. All metrics provided by connected data sources and applications can be visualized and monitored though charts, graphs, and alerts. You can also extend the core functionality of Graphana through a built-in plug-in system. Popular companies and applications like Uber, Robinhood, Nubank and others trust Graphana and its real-time visualization and monitoring capabilities.
RabbitMQ
With RabbitMQ your applications gets a common platform to send and receive messages, and your messages a safe place to live until received. Allowing your application to handle long-running or blocking tasks, and respond quickly to requests instead of being forced to perform computationally intensive tasks on the spot. The software is developed and released as open-source and is currently the most widley used free and open-source message-broker. Commercial, enterprise releases of RabbitMQ is also avalible for a subscription fee.
Gitly
Gitly is a free and open-source git-based source code management tool written in V. The software can be self-hosted affordably with a $3.5 cloud instance. Gitly is light, fast and utlize minimal ammount of RAM, and can be deployed as a single <1 MB binary, including compiled templates.