Free Software for Linux
SQLite
SQLite is a free and open-source relational database management system that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. Rather than being a typical client–server database engine, SQLite is self-contained and can be embedded into applications. Making it perfect for development frameworks that want to provide a default database without setup, or applications that needs an embedded database. SQLite is built into all mobile operating systems and most computers and comes bundled with a countless applications. SQLite is also ACID-compliant and implements most of the SQL standard, generally following PostgreSQL syntax.
IBM DB2
IBM DB2 is an enterpise-class relational database management system. IBM DB2 is built for mission critical workloads and provides advanced features like adaptive workload management, time travel query, query federation, in-database AI, row/column access control, auditing, and support for JSON, XML, and geospatial data sets. IBM DB2 is used by fortune-500 companies like Bank of America and JPMorgan Chase.
Solus
Solus is a Linux-based operating system that is designed for home computing. The OS is released as free and open-source software under the GNU General Public Licesense. Solus is a perfect replacement for macOS or Windows and delivers a cohesive computing experience loved by many.
CouchDB
CouchDB is a free and open-source document-oriented NoSQL database developed by the Apache Foundation. The database is written and implemented in the language Erlang and provides the use of multiple formats and protocols to store, transfer, and process data. With CouchDB you query data with JavaScript using MapReduce, and HTTP for an API. Which can be done across multiple distributed CouchDB instances as the database has the ability to synchronize multiple copies of the same database, across servers.
Pop!_OS
Pop!_OS is a free and open-source Linux operating system for STEM and creative professionals who use their computer as a tool to discover and create. Pop!_OS is openly developed and released by the Linux hardware manufacturer System76. With Pop!_OS you can unleash your potential on secure, reliable open source software. Pop!_OS is designed for fast navigation, easy workspace organization, and fluid, convenient workflow. Your operating system should encourage discovery, not obstruct it.
KeyDB
KeyDB is fast, free, and open-source NoSQL database with full compatibility for Redis APIs, clients, and modules. The database was originally forked from the Redis code-base and has been improved to handle multithreading, memory efficiency, and higher throughput. KeyDB is now a fully multithreaded and allow many machine cores to operate a single node resulting in 5X the throughput of Redis (v5) and up to 3x the throughput of Redis (v6). KeyDB also includes Redis Enterprise such as Active Replication, FLASH storage support, and other features like direct backup to AWS S3.
Ubuntu
Ubuntu is a free and open source Linux distribution developed and released by Canonical. The distribution uses a customized version of GNOME as desktop environment and is based on Debian. Ubuntu is the most popular Linux distribution today, and continues to drive new people to the Linux ecosystem.
Elementary OS
Elementary OS is a neat and coherent, free and open source operating system based on the Linux distribution Ubuntu. The simplicity of Elementary OS makes it a perfect choice for people switching from other popular operating systems such as macOS or Windows. Elementary OS is a feature complete operating system that comes with its own desktop environment called Pantheon and custom built, pre-installed utility applications such as Photos, Music, Videos, Calendar, Terminal, Files, and more.
ownCloud
With ownCloud, organizations can collaborate and be more production on their own secure enterprise file sharing (EFSS) platform. The ownCloud platform is self-hosted and allow for secure file sharing within an organization. The platform can be hosted on premise or on a cloud instance, controlled by the organization. The software is written in PHP and Javascript and is fully open source, released under the AGPLv3 license. ownCloud can run on most server hardware and operating systems, and the client for accessing ownCloud is available for Android, iOS, macOS, Linux and Windows.
Open Broadcaster Software
OBS is a video and streaming recording platform that records video from games, webcams, full screens, or various windows. It can also be utilized to make live streaming to video sharing websites or to a custom address that you may share with others who will watch the video you shared.