What is the license for this code?

[codeprogression]

There is no license file in this repo. What license should be added?

[psxdev]

For ps4link check http://github.com/psxdev/ps4link

Portlibs each must have its own license libz and libpng check their own. I want delete it and add them in its own repository for port of different libraries.

orbis2d is based on vita2d so you could use mit
elfloader is from hitodama ps4sdk. He is using unlicence.org however freebsd headers have their own license.
Libmod is old code from old ps2dev days ported to psp, vita and now ps4 check the header

For the rest check the headers in files to see if something is needed.