Anonymity networks

CryptoNote is an application layer protocol that powers several decentralized privacy oriented digital currencies.

Namecoin (Symbol: ℕ or NMC) is a cryptocurrency and the first fork of the bitcoin software.

Freenet is a peer-to-peer platform for censorship-resistant communication.

Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another person, or to multiple subscribers.

iMule (invisible Mule) is a free open source anonymous P2P file sharing software which connects through the anonymous I2P network and the Kad network.

YaCy (pronounced "ya see") is a free distributed search engine, built on principles of peer-to-peer (P2P) networks.

RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network built on GNU Privacy Guard (GPG).

Tails or The Amnesic Incognito Live System is a security-focused Debian-based Linux distribution aimed at preserving privacy and anonymity.

Turtle was a free anonymous peer-to-peer network project being developed at the Vrije Universiteit in Amsterdam, involving professor Andrew Tanenbaum.

Nxt is an open source cryptocurrency and payment network launched in November 2013 by anonymous software developer BCNext.

Mixminion is the standard implementation of the Type III anonymous remailer protocol.

Onion routing is a technique for anonymous communication over a computer network.

The Invisible Internet Project (I2P) is an overlay network and darknet that allows applications to send messages to each other pseudonymously and securely.

Tor Mail is a former Tor hidden service that went offline in August 2013 after an FBI raid on Freedom Hosting.

Freegate is a software application developed by Dynamic Internet Technology (DIT) that enables internet users from mainland China, North Korea, Syria, Vietnam, Iran, United Arab Emirates, among others, to view websites blocked by their governments.

Twister is free software for experimental peer-to-peer microblogging.

Lantern is a free peer-to-peer internet censorship circumvention software.

Bitblinder was an open source software program that allows users to share bandwidth and IP addresses in order to anonymously download torrents and browse the internet.

Mixmaster is a Type II anonymous remailer which sends messages in fixed-size packets and reorders them, preventing anyone watching the messages go in and out of remailers from tracing them.

StegoShare is a steganography tool that allows embedding of large files into multiple images.

ZeroNet is a decentralized Internet-like network of peer-to-peer users.

Haystack was a never-completed program intended for network traffic obfuscation and encryption.

Marabunta is a fully distributed software application for anonymous P2P.

NetShade is an app for Mac OS X and iOS which provides access to anonymous proxy and VPN servers.

Robert is a file sharing application that relies upon the security and encryption of peers and tunnels inside of I2P.

UltraSurf is a freeware Internet censorship circumvention product created by UltraReach Internet Corporation.

Java Anon Proxy, also known as JAP or JonDonym, is a proxy system designed to allow browsing the Web with revocable pseudonymity.

anoNet is a decentralized friend-to-friend network built using VPNs and software BGP routers.