Software License

[TOC]

1. Usage

Proprietary (Copyright) Software
- Focus: Intelletual Property Right of Source Code
- Publisher retains Intellectual Property rights of source code
- Often publish in Binary Code form. Source Code often not published
- Copyright: Publisher retains rights of decide whether and how to make copy
- Instance: Microsoft Windows
Free(dom) Software
- Focus:
  - Freedom to Cooperate and Control
  - Which lead to: Freedom to Run, Study, Change, Redistribute Software
  - Which lead to: Freedom to Use, Modify, Share Source Code
- Instance: Free Software Foundation, GNU Project
Open Source Software
- Focus: Freedom to Use, Modify, Share Source Code
  - Even for commercial purpose
- Instance: Open Source Initiative
Permissive (Copycenter) Software
- Free Software with no warranty and minimal redistributing requirement
- Copycenter: Minimal redistributing requirement
- Instance: MIT License
Copyleft Software
- Free Software with no warranty and same licence redistributing requirement
- Instance: GNU's General Purpose License, GPL
Notice
- Inform Recipient of:
  - Software used
  - Entire copy of license
  - Author and Contributor

Unlicense
- Anything
MIT
- Anything with notice and no warranty
GNU's General Purpose License version 3+
- Anything with notice, no warranty and same licence redistributing
Affero General Purpose License version 3
- Anything with notice, no warranty and same licence, with source code usage and redistributing