I created this list of censorship technologies that are working today.
I believe technologies like these will eventually become an essential source of unmediated information, credit and media.
Tor hosts “onion pages” that are resistant to being censored or taken down. See this list of onion pages to get started. You must have the Tor browser to view onion pages
BitTorrent is probably the most popular decentralized system in the world.
The only problem with this system is that torrent indexes are not decentralized and can be taken down — except for this notorious index still exists as an onion page ( Tor browser required).
Bitcoin is censorship-resistant money appears to be here to stay (decentralized).
Monero is an example of a truly private money transfer system that works. Note that bitcoin is traceable to some extent and is thus only psuedo-private.
Usenet is huge repository of media, file and documents has resisted censorship for decades. However, Usenet is somewhat centralized — individual provider will remove files by request. Also, Usenet provider ownership is increasingly monopolized.
Retroshare is an open-source communication and file sharing app, based on a friend-to-friend network built on GNU Privacy Guard (GPG).
Peertube is a free decentralized and federated video platform that uses peer-to-peer technology to reduce load on individual servers.
Mastodon is an open, federated social networking platform similar to Twitter. Because anyone can create an instance, it’s somewhat resistant to censorship.
It is a completely decentralized secure system that has been working since 2012.
The only drawback with this system is that you are limited to file sharing and communicate with people you already know (either offline or online)
Namecoin and Zeroweb
Namecoin is a decentralized DNS system — it shares domain names via a database using peer-to-peer technology. I’d consider this system still be in a beta version.
Zeronet is a decentralized web that allows you to view or create websites with “.bit” domains. It works but it is early stages of development.
Other systems that good in theory, but are very slow or difficult to use: