Some other interesting, similar tools

[canadaduane]

The original (maybe):
https://github.com/tiaanduplessis/kill-port

More node/js based:

• https://github.com/hilleer/kill-port-process
• https://github.com/milewski/cross-port-killer

Shell-based:

• https://github.com/xtrasimplicity/killport
• https://github.com/BalliAsghar/killport

Go-based:

• https://github.com/ridha/nkill
• https://github.com/rimiti/kill-port