This is a project I did for fun last weekend. I wanted to play with Monero RPC, and I wanted to create a simple website which uses it under the hood, so I ended up making Monero Wall.
Anyone can send a message to the Monero Wall using Monero, just by sending a transaction with any amount to the Monero Wall's wallet address.
I thought it could be fun to leave a message and come back years later, pondering, "There's my message, left in 2023 for a mere 0.001 XMR!". Or just send something random, I don't know. :D
The project is free and open-source (https://codeberg.org/orenom/monero-wall). I tried to make the code so that if anyone wanted to set up their own Monero Wall, they could do it easily.
My goal was to make the website extremely simple and minimalistic. From a technical standpoint, the website doesn't use any JavaScript or cookies. It's designed to reach users with a single HTTP request, with the response being only a few kilobytes (transferred size).