Free Unity stuff! But don't underestimate them because I have this as a Git submodule on both of my real game projects. They are all actively being used and are very crucial (to me).
Maybe someone else needs it, so I decided to share it for free. I don't reccommend you to submodule but just copy what you need. Also, I am assumimg .NET 4.6 since I want to use the new C# 6.0 syntaxes for a cleaner code.
The license for everything is MIT but attribution is optional. This repo will keeps growing over time.
I am not taking any responsibility for any problem caused by this, if there are bugs, they don't compile, or causes any revenue loss to your game!
There is a README.md file in most folders except Others, which you must look at the code to figure them out by yourself. Also I am making a website for this which should be at http://exceed7.com/free-unity-stuff once it's done.