Consider Yggdrasil
- Home: https://yggdrasil-network.github.io/
- Source code: https://github.com/yggdrasil-network/yggdrasil-go
- License: LGPLv3
- Description: Yggdrasil is an early-stage implementation of a fully end-to-end encrypted IPv6 network. It is lightweight, self-arranging, supported on multiple platforms and allows pretty much any IPv6-capable application to communicate securely with other Yggdrasil nodes. Yggdrasil does not require you to have IPv6 Internet connectivity - it also works over IPv4.