Free and open-source software

software distributed under terms that allow users to freely run, study, change and distribute it and modified versions

creative work with few or no restrictions on how it may be used

software that anyone is free to use and redistribute in its current state with a permissive licence giving a libre access to its original source code (but not necessarily to modify it)

philosophy about free redistribution and access to a product

265px|thumb|alt=Capital letter C flipped around its vertical axis, surrounded by a single line forming a circle.|Copyleft symbol

software that is both free (as in freedom) and open-source

2016 social humanoid robot

thumb|alt=5 nodes in pentagon shape with all diagonals, multicoloured similarly to a rainbow.|Proposed symbol for the Fediverse from 2018, the "fedigram"

Wikimedia portal

Linux distribution

Linux distribution

term

freely available source code, design documents or content source for possible modification and redistribution to the public

freely accessible creation and refinement of computer programs

form of adoption

overview about free and open-source graphics device driver

MeshCore is an open-source mesh networking protocol and software platform designed for off-grid, low-power text communication using LoRa (Long Range) radio technology. The system enables decentralized, multi-hop wireless messaging without reliance on cellular networks or internet infrastructure.

Business models

middleware software suite by Nvidia

OpenVSP (also Open Vehicle Sketch Pad) is an open-source parametric aircraft geometry tool originally developed by NASA. It can be used to create 3D models of aircraft and to support engineering analysis of those models.