Meshtastic is a great one. People are making all kinds of software for it. I saw someone developing a BBS for it. For those who want a summary: Meshtastic is a very low bandwidth radio system for creating mesh networks. The speed of data transfer is similar to the modems of the 80s, so you aren’t transferring anything but text. But the range is good and the hardware is cheap, and it is completely stand alone. It can normally pair with something like a phone for ease of access, but has its own dedicated device for a radio.
As a LightBurn user and license holder, this is annoying, but I could see this being a good thing in the long run. Right now, there is very little opensource alternative to LightBurn. As of today, there is a much stronger incentive to make it happen. I’m hopeful this spurs on a modern tool in the open source community that works as an alternative. What LightBurn might have done is save them selves some support overhead and created competition. We’ll see how that works out for them.