本文禁止转载~
MIT许可证是一个许可证，就是短了点。它让人们做任何他们想与你的代码，只要他们提供归属回你和不承担你的责任。
jQuery和Rails使用MIT许可。
也就是把源代码拷贝出去后他人可以做任何操作，也和作者没有关系
The MIT License (MIT)
Copyright (c) [year] [fullname]
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Apache许可证是一个许可证类似于MIT许可证，而且还提供了专利权的授予表达用户的贡献。
Apache，SVN，NuGet使用Apache许可证。
他人修改了源代码之后必须标注出哪里做出修改，这样就可以保护原作者的源代码的完整性，并且不能对修改之后的代码进行自己的版权商标添加。
Apache License 2.0
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GPL（V2和V3）是一个公共的授权，要求那些将你的代码或使源可在同样条件下所衍生的工作。V3与V2，但进一步限制使用，禁止在硬件软件的改变。
Linux，Git，WordPress使用GPL。
公开的源代码必须全部可用，他人可以进行修改使用，但是不能再次授权出许可。
GNU General Public License v2.0
GNU General Public License v3.0
(太长了就不贴了。。。)
创建一个自己的许可证
http://creativecommons.org/choose/
还有很多许可证可以选择
http://choosealicense.com/licenses/
没有许可证
你没有义务选择一个许可证，这是你的权利，不包括一个与你的代码或项目。但请注意，选择了开源许可并不意味着你选择了版权法。
你必须与你的法律顾问有关你的特殊项目，但一般而言，没有一个许可证意味着默认的版权法适用。这意味着你保留所有的权利，你的源代码，没有人可以复制，分发，或创建衍生作品，从你的工作。
不允许使用您的代码可能不是你所想的“不许可”。一个开源许可证允许您的代码重用而维护版权。如果你的目标是明确的选择了版权保护，尝试一种公共领域奉献像无照或CC0。如果你想和别人分享你的工作，你必须选择它。
即使在许可文件的情况下，你可以在你发布你的源代码到一个需要接受服务条款的情况下给予某些权利。例如，如果您发布的源代码在GitHub上的一个公共库，你接受了服务，允许其他用户的某些权利条款GitHub。具体而言，您允许其他人查看和叉您的存储库。
