Bitmask is an open source application to provide easy and secure encrypted communication. You can choose among several different service providers or start your own. Currently, Bitmask supports encrypted internet (VPN) and encrypted email.
Briar offers peer-to-peer encrypted messaging and forums, storing data securely on your device and not in the cloud. Briar also allows you to connect directly with nearby contacts without Internet access, making messaging possible with low-bandwidth or when Internet access is blocked.
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
FreedomBox is a simple private server, wireless internet router, and multi-purpose tool designed to create internet freedom with only free software and inexpensive hardware. FreedomBox is a Debian-based system designed to protect against data-mining, surveillance, and censorship.
Gnu Privacy Guard (GnuPG) for Android brings the widespread standard in OpenPGP encryption to Android. GnuPG provides solid encryption for keeping emails and files private, and for verifying that emails and files are who you think they are.
Mailvelope is an easy-to-use browser extension for Chrome and Firefox that enables the exchange of encrypted emails following the OpenPGP encryption standard.
"Onion Browser is a free and open-source web browser for iPhone and iPad that encrypts and tunnels web traffic through the Tor network, with extra features to help you browse the internet privately."
OpenKeychain is an app for Android that helps you communicate more privately and securely. It is based on the well established OpenPGP standard making encryption compatible across your devices and operating systems.
Psiphon is an open-source Internet censorship circumvention tool that uses a combination of secure communication and obfuscation technologies (VPN, SSH, and HTTP Proxy).
SecureDrop is an open-source whistleblower submission system that media organizations can use to securely accept documents from and communicate with anonymous sources.
Signal is an open source secure messaging application that uses end-to-end encryption. Signal is available for iOS, Android and desktop computers and allows users to send one-to-one messages, make voice and video calls, send group messages and voice notes.
