Smoke is an encrypting chat messenger for Android written in Java.
Please read the Web site for more information:
https://textbrowser.github.io/smoke/ (original, current)
https://www.amazon.com/dp/3752691999/
https://smokeappope.sourceforge.io/ (old, third party archive)
Smoke App OPE - Open Personal Encryption
Download Android APK Installer:
https://sourceforge.net/projects/smokeappope/files/
Smoke Source:
https://github.com/textbrowser/smoke
SmokeStack Source:
https://github.com/textbrowser/smokestack (Android)
https://github.com/textbrowser/spot-on (Desktop)
Smoke appears to be one of the first projects with an open source mobile encrypting chat server., an decentralized and easily-configurable chat server.
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Tattle Talk is an Androidapp for social communication like Google Talk and Yahoo Messenger. It is still in Prototype. You can still try it out if it works. It is intended for Android Application only. Although, there is lot of improvements has to be made. I will try to make more improvements whenever I get time.
Thanks anyways.