PS4Debug library by golden (aka @g991), developer TheRealCain532 recently made available an open source debugger for PlayStation 4 with some of his own features added as well.
Download: PS4 Debugger.exe (3.6 MB) / GIT
To quote from the README.md on the release: PS4 Debugger
This is an open source debugger for the PlayStation 4 which utilizes the debug lib built by golden. It still uses golden's debug payload as well and with his permission some of the code used in his debugger.
I mainly wanted a debugger with a few more features in it
A lot of the credit goes to golden for the concept and core code. I just optimized it a bit and put my own spin to things.
Happy Modding everybody! This project may still have several bugs so please report them as you find them!