Hello fellow nixers!

Yesterday I ran into a general purpose tool, and started thinking about the cool usages it could have, and what I could use it for. I though it could be cool to have a thread here to think about the different usage a tool can have, so feel free to share cool projects you find (keep in mind that they should not have a specific usage, like a text editor or an archiver).

Let start with [url=https://github.com/zerotier/toss], a clever LAN transfer tool!

I immediately though about backups, coupled with a VPN, but it could also serve as a shared clipboard accross a network. I need to try this real quick to see what I can do with it!
What would you use it for?