It is a simple software that returns IP address after entering a Host-Name.
It works only under the WiFi.

This app is developed as an open source.
https://github.com/Network-Revolution/DotLocalFinder

If you find the debian or ubuntu or centos or Red-Hat PCThese PC need to have mDNS installed.
Please input the following command.
apt install avahi-daemon libnss-mdns
dnf install avahi avahi-tools nss-mdns
yum install avahi avahi-tools nss-mdns

Windows10 and macOS have mDNS installed from the beginning so you can find it without any action.
If you have even mDNS installed you can also find SBCs such as ESP32 or micro:bit.
The following example shows how to build a host with Arduino.
https://github.com/Vasil-Pahomov/Liana
https://tttapa.github.io/ESP8266/Chap08%20-%20mDNS.html

You can do not only Arduino but also Golang
https://github.com/hashicorp/mdns

but also Python
https://pypi.org/project/mdns-publisher/

Of courseBoth Golang and Python run on ESP32.
https://tinygo.org/faq/what-about-esp8266-esp32/
https://docs.micropython.org/en/latest/esp32/tutorial/intro.html

Python run on micro:bit.
https://microbit-micropython.readthedocs.io/en/latest/

Of course you can also find RaspberryPi with Raspbian installed.
You should search for "raspberrypi" in this app!