Zetta Com v1.0.0
The first release. A LAN intercom: hold a key and the people you choose hear you — one person or the whole room. No internet, no accounts, no server.
Windows — run the x64-setup.exe. It asks for administrator because it adds its own firewall rule, so there is no first-start prompt to get wrong.
macOS — Apple silicon only, and unsigned, so macOS will call it "damaged". It is not. Move it to /Applications, then xattr -cr "/Applications/Zetta Com.app". Then turn on System Settings → Privacy & Security → Local Network, because clearing quarantine can mean the prompt never appears — and without it the app runs, advertises, and hears nobody.
Linux — .deb, .AppImage or .rpm.
Shortcuts: hold F8 to talk to whoever is selected, Ctrl+1…9 for a specific PC, Ctrl+0 for everyone. F9 starts and stops, F1 lists every key including any that failed to register.
There is no encryption. Anyone who can capture packets on the network can reconstruct a conversation. Run it on a LAN you control.