Spine is a PS4 emulator that runs on Linux, and according to its developer, the first publicly available PS4 emulator to be able to launch commercial games

GameMakerPKGBuilder lets you recompile and install GameMaker PC games, to run on your PS4.

Assembler/Disassembler/Game Trainer for PS4 (PC Tool)

Homebrew Enabler for PS4 with the following features:

- Homebrew Enabler
- Debug Settings
- VR Support
- Remote Package Install
- Rest Mode Support
- External HDD Support
- Official External (...)

PS4 Offline Account Activator is a tool that activates PSN account on jailbroken PS4, allowing you to export save data to USB among other things. 

Homebrew Enabler for PS4 with the following features:

- Homebrew Enabler
- Debug Settings
- VR Support
- Remote Package Install
- Rest Mode Support
- External HDD Support
- Official External (...)

LogMeIn Hamachi for PS4
This is not an official product by LogMeIn Inc.

This is a port of LogMeIn Hamachi virtual LAN client to the PS4. It is done by wrapping the linux binary.

Payload Injecting GUI for PS4. Defaults to port 9020

7.50, expects payload on 9020/tcp. Applied patches: mmap, mprotect, syscall everywhere, kexec, delayed panics.

Reported compatible with 7.55 as well

Payload for Jailbroken PS4s to leave IDU mode.

If your PS4 is stuck in IDU mode this should help.