Chat "off-the-grid" with people around you – even if there is no Internet connection or mobile phone coverage.

Mesh routing protocol designed to handle a massive amount of nodes with very low resource consumption. Thanks to this feature it can be easily used to build a worldwide distributed, anonymous and uncontrolled network, separated from the Internet, without the support of any...

Surf the web through the Tor network with this open source browser for iOS devices.

Windscribe is a desktop application and browser extension that work together to block ads and trackers, restore access to blocked content and help you safeguard your privacy online.

Threema is a new mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that only you and the intended recipient can read your messages.

Free and open-source Android-based OS for smartphones and tablets that enables deep customization, regular security updates, privacy focus, and broad device compatibility.

AOKP stands for Android Open Kang Project. It is a custom ROM distribution for many Android devices. It is mostly based off of AOSP.

A security and privacy focused mobile operating system compatible with Android apps. Google-free secure Android for the latest hardware.

MiniKeePass provides secure password storage on your phone that's compatible with KeePass.

KeePassXC is a modern, secure, and open-source password manager that stores and manages your most sensitive information.

A decentralized messaging and sharing app built on top of Secure Scuttlebutt (SSB).

Hubzilla is a powerful platform for creating interconnected based websites featuring a decentralised identity, communications, and permissions framework built using common webserver technology. Hubzilla is very suitable for communities (of any size).

Friendica is a distributed social network application. Which allow users to connect with others via their own Friendica server, but may also fully integrate contacts from other platforms including Twitter, diaspora*, Pump.io and StatusNet into their 'newsfeed'.

Federated and open-source social network with no ads, 500-character limit, custom emojis, and content warnings, emphasizing privacy and personal interaction.

An example application that demonstrates how to build peer-to-peer Web applications with Beaker Browser, Dat, and WebDB.

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the...

Cisco Umbrella (formerly OpenDNS) provides the first line of defense against threats on the internet wherever users go.

dnscrypt-proxy - A tool for securing communications between a client and a DNS resolver

CryptoKitties is a game centered around breedable, collectible, and oh-so-adorable creatures we call CryptoKitties! Each cat is one-of-a-kind and 100% owned by you; it cannot be replicated, taken away, or destroyed.

Ethereum is a decentralized platform that runs smart contracts: applications that run exactly as programmed without any possibility of downtime, censorship, fraud or third party interference.

Zcash is the first open, permissionless cryptocurrency that can fully protect the privacy of transactions using zero-knowledge cryptography.

iptablesbuild is effectively a configuration manager for iptables. It is intended to manage iptables configurations in a centralized location for multiple systems.

Gufw is an easy, intuitive way to manage your Linux firewall. It supports common tasks such as allowing or blocking pre-configured, common p2p, or individual ports port(s), and many others! Gufw is powered by Uncomplicated Firewall (ufw).

CryFS encrypts your files, so you can safely store them anywhere. It works well together with cloud services like Dropbox, iCloud, OneDrive and others.

Secure and encrypt entire partitions or devices, including system drives, with automated, real-time protection and enhanced security measures.

[TrueCrypt is not exactly "Open Source", but the source is available. See the reviews to get more information.]

LUKS is the standard for Linux hard disk encryption. By providing a standard on-disk-format, it does not only facilitate compatibility among distributions, but also provides secure management of multiple user passwords.

Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.

Cock.li is your go-to solution for professional E-mail addresses and XMPP addresses. Since 2013 cock.li has provided stable E-mail services to an ever-increasing number of users. Cock.li allows registration and usage using Tor and other privacy services (proxies, VPNs) and is...