ECnet is described as ', as anticipated at the top of the page, more than a hidden network, becomes a real alternative to the Internet as we know it' and is an app in the Security & Privacy category. There are more than 10 alternatives to ECnet for a variety of platforms, including Linux, Mac, Windows, BSD and Android. The best alternative is Tor Browser, which is both free and Open Source. Other great apps like ECnet are Tor (Free, Open Source), Diaspora (Free, Open Source), ZeroNet (Free, Open Source) and Freenet (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.