Open Source Java Messaging Platforms

Telegram is a wonderful and private messaging app that offers simple, fast, secure and synced messaging for all your devices. It delivers messages faster than any other application; cloud-based so you can access your messages from any device; and very secure, with messages heavily encrypted and could even self-destruct. Telegram is simple and fun to use, with powerful photo and video editing tools as well as an open sticker/GIF platform to let you express yourself fully. It’s also incredibly powerful. Whether you’re setting up a group chat for up to 200,000 members or sharing large videos or documents, Telegram is up to the task. Best of all it’s completely free and open source, with no ads or subscription fees.

This open-source library allows you to integrate Facebook into your Android app. Integrate your Android app with Facebook to build engaging social apps by using the Facebook SDK for Android. To learn more about using Facebook development tools. The current version of the Facebook SDK for Android is version 11.2.0 and requires the Android API 15. Code and samples for the Facebook SDK for Android are available on GitHub. A secure and convenient way for people to log into your app or website by using their Facebook credentials. Enable people to post to Facebook from your app. People can share, send a message, and share to stories. Understand people's actions in your app and measure the effectiveness of your Mobile App Ads. Get data in and out of Facebook's social graph, query data, post stories, upload photos and perform other tasks.

Signal Server is the official backend server component that supports the Signal Private Messenger ecosystem on Android, iOS, and desktop platforms, serving as the trusted message relay, contact discovery, and push notification hub while the clients handle end-to-end encryption. Built in Java and licensed under the AGPL-3.0 license, this server software handles protocols for delivering encrypted messages, synchronizing user metadata like public keys and push tokens, and providing REST and service APIs for the client apps to interact with. Although cryptographic operations and message confidentiality are managed by the client side using the Signal Protocol, the server ensures message routing, user registration, and group updates without having access to the decrypted contents. Its codebase is public to ensure transparency and auditability for a security-focused community willing to inspect how message metadata and delivery mechanisms are implemented.

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. Smoke is known as the first mobile McEliece Messenger: https://tarnkappe.info/artikel/english/mceliece-messaging-smoke-crypto-chat-the-first-mobile-mceliece-messenger-published-as-a-stable-prototype-worldwide-279847.html

Fall in love with texting all over again with QKSMS! QKSMS is a beautiful, simple and customizable open source replacement to the stock messaging app on Android. It's got a clean, clutter-free intuitive design that lets you focus on what matters, plus millions of colors to choose from to make the theme of the entire app truly your own. QKSMS has some powerful features, including photo sharing, group chat, conversation blocking, message backup and restore and more. It's got everything you need from a text messaging app, plus all the fun features that make for a great text messaging experience. Simply put, QKSMS makes texting magical again, just the way it should be!

P2PChat is a instant messenger based on Java, JavaFX and direct IP connections.

CIM(CROSS-IM)A developer-oriented system, provides components to help developers build their own distributed instant messaging system that can be a horizontal scaling IM. CIM is an IM Instant messaging system, can be applied as a message push middleware. IOT Message transparent transmission middleware in massive connection scenarios. Provides flexible horizontal expansion and contraction according to the actual situation. The server automatically removes offline clients. Client reconnects automatically. You can use Google Protocol Bufferefficient codec. Its protocol supports message encryption. Store routing information, account information, online status, etc. of each client. Message routing server; used to process message routing, message forwarding, user login, user offline, and some operational tools (obtaining the number of online users, etc.).

Kraken is a continuation of the Openfire IM Gateway plugin, but in a way that works for any XMPP server. It provides a way for XMPP users to log into, and communicate through, their legacy IM accounts such as AIM, ICQ, MSN, Yahoo, and friends.

JML is a java Msn Messenger library that supports MSNP8-MSNP15. It is optimized for multiple users and is intended to be very easy to follow and use.

IpChat is a comprehensive network communication tool, similar to a regular instant messenger. However IpChat unlike other IM networks is completelly decentralized, requiring no pre-existing server.

a java based LAN messenger CHECK OUT AND SUPPORT MY LATEST ANDROID PROJECTS IN HERE: https://play.google.com/store/apps/developer?id=Deepak+PK

This project provides a basic Java implementation of the OSCAR protocol, used by ICQ and AIM clients. Commonly used features such as messaging, status and server buddy lists are supported, making it easy for developers to use this in their own work.

Jalk: an instant messenging system for small work groups - written in Java (--> OS independent) - clients can reside behind a firewall (incl. NAT) - encrypted comunication - participants can see the others typing and correcting (like unix talk)

EZ Intranet Messenger is designed to work within a LAN segment, without the presence of centralized server. Its primary goal is to provide instant messaging service, along with online status notification, file transmission, and real time public chat.

ZIM-Pro - A P2P Instant Messenger based on Jxta Technology. Its features: Search for users by key words and location and add to contact list. Secure Messaging, Chatting, and File sharing, Invite offline users through E-mail, Message archiving, etc...

It is an instant messaging client. Crony IM has support for some commonly used instant messaging protocols, allowing the user to log into various different services from one application. like LAN, GTalk, Yahoo, Facebook.

SKIM is an easy-to-use instant messenger completely written in Java. SKIM is open source and published under the GNU General Public License (GPL).

This project contain chat server and chat client/admin that works on Windows/Unix.. This is a Free software. Developed by Osama Mohammad Oransa, 2009,contain 3 parts : Chat Server ,Admin and Chat Clients, Based on Java RMI, will support XMPP soon.

Facebook Chat IM is a Desktop Messenger for Facebook. With it you can chat with all your Facebook friends directly from your Desktop. It has a simple and easy to use interface and offers many great features such as emoticon, status update notification, sound alerts, chat history and much more. It’s written in Java and released under the GNU LGPL.

An open-sourced all-in-one messenging client. The client includes AOL OSCAR, IRC, MSN Messenger, Yahoo! Messenger, and ICQ (OSCAR). Written in Java for cross-platform support.

GOIM is a Jabber client with special features targeted at gamers. It is based on the eclipse rcp and will include all major jabber features in addition to displaying who in the roster is playing which game on which server and other game related features.

Does not work because there is no master server! A P2P Messenger which uses JXTA. It provides secure RSA/AES end-to-end encryption and VoIP-Capabilities.

It's just another Instant Messenger based on jabber

Ice Messenger is a small Chat, where you talk about something with your friends our other people. Ice Messenger you can allready use at your office and other places. It has written in Java and so you can use it one all platforms which can use Java. Here are a few: Windows, Linux, Unix, Solaris, Macintosh and more. This application is in the first version and so it has much of errors and other bugs! Describe your bugs and errors in the forum.

Island is a Serverless LAN Based Instant Messaging Tool that reaches anyone in the same subnet by using TCP/IP broadcast notifications. There is no need to add contacts since all of them are there.