
Telegram
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful. .
Open source instant messaging server and clients. Backend in pure Go (license GPL 3.0), client-side binding in Java for Android and Javascript (license Apache 2.0)...
Open source instant messaging server and clients. Backend in pure Go (license GPL 3.0), clientside binding in Java for Android and Javascript (license Apache 2.0), persistent storage RethinkDB. JSON over websocket (long polling is also available). Tinode is meant as a replacement for XMPP. Overall it's a lot like open source WhatsApp or Telegram.
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Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free. It is like SMS, but more powerful. .
Free Mac OS X Windows Linux Android iPhone Web Blackberry Mac Windows Mobile
WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS.
Free Mac OS X Windows Android iPhone Android Tablet Web Blackberry S60
TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in real time with all your friends at once, and share media or...
Free Open Source Mac OS X Windows Linux Android iPhone Android Tablet iPad Chrome
ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.
Free Open Source iPhone iPad
Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].
Free Open Source Android Android Tablet
Protect your communication in transit and on your phone.
Free Open Source Android Kindle Fire
Dialog Messenger is a customized self-hosted platform usable across multi operation systems simultaneously. dialog provides SDK tools for client interface as well as for server.
Free Personal Mac OS X Windows Linux Android iPhone Web Self-Hosted
Google Allo is a smart messaging app that helps you say more and do more. Express yourself better with stickers, Smart Reply, and HUGE emojis & text. Allo brings you the Google Assistant.
Free Android iPhone Web
With group calls up to 256 users, Video4sure is an easy way to make video calls or setup group meetings. No need to register, install or pay.
Free Web Chrome Firefox Opera
plus messenger is an messaging app that uses telegram 's api. plus messenger has all of telegram's features plus themes. plus messenger is free for android devices.
Free Android Android Tablet
atomjump.com is a well tuned hosted version of the free open-source atomjump.org. it is free to chat publicly with your family, group...
Free Open Source Mac OS X Windows Linux Android iPhone