Internet privacy software

daemon and utilities for an anonymizing network

DuckDuckGo is an American software company focused on online privacy whose flagship product is a search engine named DuckDuckGo. Founded by Gabriel Weinberg in 2008, its later products include browser extensions and a custom DuckDuckGo web browser. Headquartered in Paoli, Pennsylvania, DuckDuckGo is a privately held company with about 200 employees. The company's name is a reference to the children's game duck, duck, goose.

privacy-focused encrypted messaging app

alt=Kiwix, running on an Android tablet|thumb|272x272px|Kiwix app, running on an Android tablet Kiwix is a free and open-source offline web browser created by Emmanuel Engelhart and Renaud Gaudin in 2007. It was first launched to enable offline access to Wikipedia, but has since expanded to include other projects from the Wikimedia Foundation, public domain texts from Project Gutenberg, many of the Stack Exchange sites, and many other resources. Available in more than 100 languages, Kiwix has been included in several high-profile projects, from smuggling operations in North Korea to Googl

computer program for data encryption, primarily in email (PGP)

privacy-focused search engine

end-to-end encrypted e-mail service from Proton AG

NordVPN is a Lithuanian VPN service founded in 2012. NordVPN is developed by Nord Security (formerly Nordsec Ltd), a cybersecurity software company that was initially supported by Tesonet, a Lithuanian startup accelerator and business incubator. NordVPN states it operates in Panama, but Nord Security is incorporated in Amsterdam, the Netherlands. Its offices are located in Lithuania, the United Kingdom, Panama, and the Netherlands.

The Invisible Internet Project (I2P) is an anonymous network layer (implemented as a mix network) that allows for censorship-resistant, peer-to-peer communication. Anonymous connections are achieved by encrypting the user's traffic (by using end-to-end encryption), and sending it through a volunteer-run network of roughly 55,000 computers distributed around the world. Given the high number of possible paths the traffic can transit, a third party watching a full connection is unlikely. The software that implements this layer is called an "I2P router", and a computer running I2P is called an "I2

uBlock Origin is a free and open-source browser extension for content filtering, including ad blocking. The extension is available for Firefox and Chromium-based browsers.

content-addressable, peer-to-peer hypermedia distribution protocol

SOCKS is an Internet protocol that exchanges network packets between a client and server through a proxy server. SOCKS5 optionally provides authentication, so only authorized users may access a server. Practically, a SOCKS server proxies TCP connections to an arbitrary IP address and provides a means for UDP packets to be forwarded. The SOCKS protocol operates between the application layer and the transport layer. A SOCKS server accepts incoming client connection on TCP port 1080.

free and open-source map navigation app, designed to function without internet connectivity

Threema is a paid cross-platform encrypted instant messaging app developed by Threema GmbH in Switzerland and launched in 2012. Users can make voice and video calls, send photos, files, and voice notes, share locations, and join groups. The service offers end-to-end encryption. Unlike many other popular secure messaging apps, Threema does not require phone numbers or email addresses for registration, only a one-time purchase that can be paid via an app store or anonymously with Bitcoin or cash.

ZeroNet is a decentralized web-like network of peer-to-peer users, created by Tamas Kocsis in 2015. The programming for the network was based in Budapest, Hungary. It is built in Python and fully open source. Instead of having an IP address, sites are identified by a public key (specifically a bitcoin address). The private key allows the owner of a site to sign and publish changes, which propagate through the network. Sites can be accessed through an ordinary web browser when using the ZeroNet application, which acts as a local webhost for such pages. In addition to using bitcoin cryptography,

UltraSurf is a closed-source freeware Internet censorship circumvention product created by UltraReach Internet Corporation. The software bypasses Internet censorship and firewalls using an HTTP proxy server, and employs encryption protocols for privacy.

cryptographic protocol for instant messaging providing forward secrecy and malleable encryption using 128-bit AES, 1536-bit Diffie–Hellman, and SHA-1

instant messaging client

Cryptocat is a discontinued open-source desktop application intended to allow encrypted online chatting available for Windows, OS X, and Linux. It uses end-to-end encryption to secure all communications to other Cryptocat users. Users are given the option of independently verifying their buddies' device lists and are notified when a buddy's device list is modified and all updates are verified through the built-in update downloader.

Retroshare is a free and open-source peer-to-peer communication and file sharing app based on a friend-to-friend network built by GNU Privacy Guard (GPG). Optionally peers may exchange certificates and IP addresses to their friends and vice versa.

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.

virtual private network provider

Searx (; stylized as searX) is a discontinued free and open-source metasearch engine, available under the GNU Affero General Public License version 3, with the aim of protecting the privacy of its users. To this end, Searx does not share users' IP addresses or search history with the search engines from which it gathers results. Tracking cookies served by the search engines are blocked, preventing user-profiling-based results modification. By default, Searx queries are submitted via HTTP POST, to prevent users' query keywords from appearing in webserver logs. Searx was inspired by the Seeks pr

TextSecure was an encrypted messaging application for Android that was developed from 2010 to 2015. It was a predecessor to Signal and the first application to use the Signal Protocol, which has since been implemented into WhatsApp and other applications. TextSecure used end-to-end encryption to secure the transmission of text messages, group messages, attachments and media messages to other TextSecure users.

Freegate is a software application developed by Dynamic Internet Technology (DIT) that enables internet users to view websites blocked by their governments. The program takes advantage of a range of proxy servers called Dynaweb. This allows users to bypass Internet firewalls that block web sites by using DIT's Peer-to-peer (P2P)-like proxy network system. FreeGate's anti-censorship capability is further enhanced by a new, unique encryption and compression algorithm in the versions of 6.33 and above. Dynamic Internet Technology estimates Freegate had 200,000 users in 2004. The maintainer and CE

PeerGuardian is a discontinued free and open source program developed by Phoenix Labs. It is capable of blocking incoming and outgoing connections based on IP blacklists. The aim of its use was to block peers on the same torrent download from any visibility of your own peer connection using IP lists. The system is also capable of blocking custom ranges, depending upon user preferences.

Mailfence is a Belgian encrypted email service with a focus on security and privacy that offers OpenPGP based end-to-end encryption and digital signatures for usage in emails. It was launched in November 2013 by ContactOffice Group, which has been operating an online collaboration suite since 1999.

open source privacy-enhancing web browser extension

encrypted private messenger

web decentralization project

Ghostery is a free and open-source privacy and security-related browser extension and mobile browser application. Since February 2017, it has been owned by the German company Cliqz International GmbH (formerly owned by Evidon, Inc., which was previously called Ghostery, Inc. and the Better Advertising Project). The code was originally developed by David Cancel and associates.

software

virtual private network

thumb|Logo of OMEMO OMEMO is an extension to the Extensible Messaging and Presence Protocol (XMPP) for multi-client end-to-end encryption developed by Andreas Straub. According to Straub, OMEMO uses the Double Ratchet Algorithm "to provide multi-end to multi-end encryption, allowing messages to be synchronized securely across multiple clients, even if some of them are offline". The name "OMEMO" is a recursive acronym for "OMEMO Multi-End Message and Object Encryption". It is an open standard based on the Double Ratchet Algorithm and the Personal Eventing Protocol (PEP, XEP-0163). OMEMO offers

PeerBlock is a free and open-source personal firewall that blocks packets coming from, or going to, a maintained list of blacklisted hosts. PeerBlock is the Windows successor to the software PeerGuardian (which is currently maintained only for Linux). It blocks incoming and outgoing connections to IP addresses that are included on blacklists (made available on the Internet), and to addresses specified by the user. PeerBlock mainly uses blacklists provided by iblocklist.com.

distributed peer-to-peer application in which participants are anonymous or pseudonymous

graphical controller for the Tor software

WebTorrent is a peer-to-peer (P2P) streaming torrent client written in JavaScript that enables BitTorrent functionality directly within web browsers. Created by Feross Aboukhadijeh, the developer behind YouTube Instant, WebTorrent implements the BitTorrent protocol using WebRTC for peer-to-peer data transfer, allowing users to download and stream torrents without requiring traditional torrent client software.

app for voice communications over VoIP protocol

ZNC is an IRC bouncer. It can detach the client from the actual IRC server, and also from selected channels. Multiple clients from different locations can connect to a single ZNC account simultaneously and therefore appear under the same nickname on IRC. It supports Transport Layer Security connections and IPv6.

Hushmail is an encrypted proprietary web-based email service offering PGP-encrypted e-mail and vanity domain service. Hushmail uses OpenPGP standards. If public encryption keys are available to both recipient and sender (either both are Hushmail users or have uploaded PGP keys to the Hush keyserver), Hushmail can convey authenticated, encrypted messages in both directions.

free software

encrypted instant messenger app (IM)

software used to deduce the geographic location of another party

tool for exchanging contents in an anonymous and secure way over a friend-to-friend (F2F) network

GoodbyeDPI is a free and open-source software tool for bypassing deep packet inspection (DPI) systems and Internet censorship. It was created by Russian developer ValdikSS in 2016 and is distributed under the Apache License via GitHub.

Mozilla Firefox browser add-on

virtual private network provider

thumb|'Tor Stinks' NSA presentation |page=7 Evercookie (also known as supercookie) is an open-source JavaScript application programming interface (API) that identifies and reproduces intentionally deleted cookies on the clients' browser storage. This behavior is known as a zombie cookie. It was created by Samy Kamkar in 2010 to demonstrate the possible infiltration from the websites that use respawning. Websites that have adopted this mechanism can identify users even if they attempt to delete the previously stored cookies.

Decentraleyes is a free and open-source browser extension used for local content delivery network (CDN) emulation. Its primary task is to block connections to major CDNs such as Cloudflare and Google (for privacy and anti-tracking purposes) and serve popular web libraries (such as JQuery and AngularJS) locally on the user's machine. Decentraleyes is available for Microsoft Edge, Mozilla Firefox + Firefox ESR, Google Chrome, Pale Moon and Opera web browsers.