AutoHotKeys and libraries that I have written or modified.
I like to keep all my key assignments in one place. That way I don't have to remember where key assignments are, if I want to change it, or add to that assignment. Also, I only need to add #includes in one place.
Most (all?) of the scripts I have written have the necessary #includes in comments, for if they are used stand-alone.
I have multiple accounts on my computer, for various reasons, and don't often remember to update each AutoHotKey library folder with up-to-date libs. This folder is publicly readable/writable by all users on the machine. So I created C:\Users\Public\AutoHotKeys to put my master key file, and C:\Users\Public\AutoHotKeys\Lib to contain all my libraries.
Microsoft has a wonderful tool, PowerToys, that offers easy expansion of the File Explorer right click 'New' functionality 'New+'. In C:\Users\Public\PowerToys\NewPlus there is a Templates folder that you simply drop your template file and it is made available in the right click menu 'New+'. I use a lot of PowerToys tools, check it out!