How To Secure Your Network: Five Modern Alternatives to VPN June 17, 2019 https://www.bleepingcomputer.com/ne...your-network-five-modern-alternatives-to-vpn/
We could just call them all overlay networks Also, to be picky: VPN + Daisy-chain <> Tor. Tor uses "onion routers" aka relays, but they're nothing like VPNs, which are basically virtual routers. But you could say VPN + Daisy-chain = I2P, I suppose.