Open Source

Open-source software (OSS) is computer software with its source code made available with a license in which the copyrightholder provides the rights to study, change, and distribute the software to anyone and for any purpose.

https://en.wikipedia.org/wiki/Open-source_software

Open-source software may be developed in a collaborative public manner. According to scientists who studied it, open-source software is a prominent example of open collaboration.

Open-source software development, or collaborative development from multiple independent sources, generates an increasingly more diverse scope of design perspective than any one company is capable of developing and sustaining long term. A 2008 report by the Standish Group states that adoption of open-source software models has resulted in savings of about $60 billion (£48 billion) per year to consumers.