LibrePing is AGPL-3.0 uptime monitoring built in Go. Hubs and probes gossip checks over libp2p so multi-location HTTP/TCP/DNS/TLS/ICMP/traceroute results are not owned by one SaaS. Public demo needs no signup. Alerts via ntfy, Discord, Slack, or webhooks.
I wanted multi-location uptime checks without depending on a central SaaS that owns the measurements. LibrePing federates hubs and probes over libp2p so the mesh shares signed results; the public demo needs no account.