https://creativecommons.org/licenses/by-nc-nd/4.0/

Apex Design Collective is by theDragn, and is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
What this means: don't sell it, if you change anything in the mod you may not redistribute it, and you can't redistribute its individual assets, with or without modification. 

This license does not apply to the code! Feel free to use any code in here however you want. Credit is appreciated but not required. 
Code not originally by me (some of the missile AI scripts) is under its original license, which at time of writing was CC-NC-SA for the MagicLib missile AI.