Netsukuku is described as 'Mesh routing protocol designed to handle a massive amount of nodes with very low resource consumption' and is an app in the Network & Admin category. There are more than 25 alternatives to Netsukuku for a variety of platforms, including Linux, Windows, Mac, Android and iPhone. The best alternative is Tor Browser, which is both free and Open Source. Other great apps like Netsukuku are Tor (Free, Open Source), ProtonVPN (Freemium, Open Source), Freenet (Free, Open Source) and I2P (Free, Open Source).
The Tor software protects you by bouncing your communications around a distributed network of relays run by volunteers all around the world: it prevents somebody watching your Internet connection from learning what sites you visit, it prevents the sites you visit from learning...
Tor is free software and an open network that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security.
GNUnet is a framework for secure peer-to-peer networking that does not use any centralized or otherwise trusted services. A first service implemented on top of the networking layer allows anonymous censorship-resistant file-sharing.