Open Source Software Licenses

Strong copyleft license that requires sharing source including server-side code.

Very permissive license allowing almost unrestricted reuse.

Updated version of GPL-2.0 with added protection against tivoization and patents.

Permissive license with patent grant and conditions for redistribution.

Copyleft license requiring derivative works to also be GPL-licensed.

The BSD 3-Clause License is a permissive open-source license that allows anyone to use, modify, and distribute the code, including in proprietary software, as long as they keep the copyright notice, include the license in binary distributions, and do not use the author’s name to endorse products without permission. It comes with no warranty.

Weak copyleft license; modified files must be open, but can be part of proprietary code.

Permissive license — use freely with attribution; retain the copyright notice and disclaimer.

Public domain equivalent — no restrictions whatsoever, not even attribution required.

Permissive license requiring attribution notices to be preserved and displayed in derived works.