Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.

Tinfoil Chat - Onion-routed, endpoint secure messaging system

Threema App for Android.

ADAMANT Decentralized Messenger. Progressive Web Application (PWA)

Threema App for iOS.

ADAMANT Javascript API library

Tox Reference implementation for Android

Real-time P2P messenger using go-ipfs pubsub. TUI. End-to-end encrypted texting & file-sharing. NAT traversal.

A command-line bound implementation of secure synchronous lightweight chatroom with zero logging and total transience built using WebSockets, Fernet Cryptography, Asyncio and Prompt Toolkit

iGap Client for Android Source Code

A secure synchronous lightweight chatroom with zero logging and total transience

qTox is a chat, voice, video, and file transfer IM client using the encrypted peer-to-peer Tox protocol.

iGap Core Messaging offer Open APIs for developers . This API allows you to build your own customized iGap clients.

An alternative official version iGap messenger client

iGap Client for iOS Source Code

Secure chat is flutter based messaging app that would protect your chats anywhere anytime!🔒

Air-gapped IOTA Accounting System For Governments, Institutions, Individuals, and Machines

Reboot of the Tox Messenger for the IPhone

A Chat Application In Pure Python with 256-Bit AES Encryption.

An android messenger that only needs a username. Also, there's encryption