Showing 879 open source projects for "client server chat java"

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  • 1
    Signal Server

    Signal Server

    Server supporting the Signal Private Messenger applications on Android

    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. ...
    Downloads: 7 This Week
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  • 2
    Spacebar Server

    Spacebar Server

    A reimplementation of the Discord.com backend, built with Typescript

    ...It is part of the broader Spacebar ecosystem for decentralized, self-hostable chat infrastructure. The project is useful for developers interested in Discord-like systems, real-time communication protocols, and independently operated chat services. Some compatibility gaps still exist, so not every Discord client can connect perfectly to a Spacebar instance.
    Downloads: 0 This Week
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  • 3
    Realtime Chat Application

    Realtime Chat Application

    Build and deploy a real time chat application

    This full-stack tutorial project shows how to build and deploy a real-time chat app using React on the client and Node/Express with Socket.io on the server. It covers the mechanics of establishing WebSocket connections, broadcasting and receiving messages, and maintaining active user rooms. The repository includes scripts and instructions to spin up both client and server quickly so you can experiment locally.
    Downloads: 1 This Week
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  • 4
    Tinode Instant Messaging Server

    Tinode Instant Messaging Server

    Instant messaging platform

    Instant messaging server. Backend in pure Go (license GPL 3.0), client-side binding in Java, Javascript, and Swift, as well as gRPC client support for C++, C#, Go, Java, Node, PHP, Python, Ruby, Objective-C, etc. (license Apache 2.0). Wire transport is JSON over websocket (long polling is also available) for custom bindings, or protobuf with gRPC. Persistent storage is any one of RethinkDB, MySQL or MongoDB.
    Downloads: 63 This Week
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  • 5
    Discord Client Encyclopedia

    Discord Client Encyclopedia

    A non-exhaustive collection of third-party clients for Discord

    Discord Client Encyclopedia is a curated reference repository for third-party Discord clients, client mods, wrappers, adapters, and related projects. It organizes entries across mobile, desktop, game console, alternative client, and server-implementation categories. Each listing includes practical metadata such as platform type, feature summary, language, and development status when available. The project is not a client itself, but a research index for comparing the broader Discord...
    Downloads: 1 This Week
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  • 6
    Mumble

    Mumble

    Mumble is an open-source, low-latency, high quality voice chat

    Mumble is an open-source, low-latency, high-quality voice chat software. There are two modules in Mumble; the client (mumble) and the server (murmur). The client works on Windows, Linux, FreeBSD, OpenBSD, and macOS, while the server should work on anything Qt can be installed on. Low-latency and high-quality voice-chat program written on top of Qt and Opus. Administrators appreciate Mumble for being able to self-host and have control over data security and privacy. ...
    Downloads: 13 This Week
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  • 7
    CIM

    CIM

    Distributed instant messaging system for developers

    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...
    Downloads: 0 This Week
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  • 8
    SimpleXMQ

    SimpleXMQ

    A reference implementation of the SimpleX Messaging Protocol

    A reference implementation of the SimpleX Messaging Protocol for simplex queues over public networks. SimpleXMQ is a message broker for managing message queues and sending messages over a public network. It consists of an SMP server, SMP client library, and SMP agent that implements SMP protocol for client-server communication and SMP agent protocol to manage duplex connections via simplex queues on multiple SMP servers. SMP protocol is inspired by Redis serialization protocol, but it is...
    Downloads: 2 This Week
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  • 9
    Spacebar

    Spacebar

    Free selfhostable discord compatible communication platform

    ...Spacebar also highlights extensibility through plugins and visual customization through themes and a design editor. Its ecosystem includes server, client, documentation, and landing page repositories.
    Downloads: 4 This Week
    Last Update:
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  • 10
    YABDP4Nitro

    YABDP4Nitro

    Yet Another BetterDiscord Plugin for Nitro features

    YABDP4Nitro is a BetterDiscord plugin focused on expanding Discord’s local client experience with Nitro-like interface enhancements. It includes options related to screen sharing quality, emoji usage, profile styling, client themes, and other customization features. The project is made for users who already run BetterDiscord and want a single plugin that groups many premium-style visual and usability tweaks. It is not affiliated with Discord, and its functionality may conflict with Discord’s...
    Downloads: 81 This Week
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  • 11
    MobileIMSDK

    MobileIMSDK

    The original full-platform IM communication layer framework

    MobileIMSDK is a lightweight cross-platform instant messaging communication framework designed for real-time chat and push-style communication. It supports multiple client platforms, including iOS, Android, Java, HTML5, mini programs, UniApp, and HarmonyOS Next, with a Netty-based server side. The framework is notable for supporting UDP, TCP, and WebSocket protocols in the same open-source IM communication layer. It has been developed and refined over many years, making it a mature option for teams building custom messaging systems. ...
    Downloads: 0 This Week
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  • 12
    JDA

    JDA

    Java wrapper for the popular chat & VOIP service

    JDA strives to provide a clean and full wrapping of the Discord REST api and its Websocket-Events for Java. This library is a helpful tool that provides the functionality to create a discord bot in java. Discord is currently prohibiting the creation and usage of automated client accounts (AccountType.CLIENT). We have officially dropped support for client login as of version 4.2.0! Note that JDA is not a good tool to build a custom discord client as it loads all servers/guilds on startup,...
    Downloads: 0 This Week
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  • 13
    DiscordGo

    DiscordGo

    (Golang) Go bindings for Discord

    DiscordGo is a Go package that provides low level bindings to the Discord chat client API. DiscordGo has nearly complete support for all of the Discord API endpoints, websocket interface, and voice interface. If you would like to help the DiscordGo package please use this link to add the official DiscordGo test bot dgo to your server. This provides indispensable help to this project. Construct a new Discord client which can be used to access the variety of Discord API functions and to set callback functions for Discord events. ...
    Downloads: 0 This Week
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  • 14
    Element X Android

    Element X Android

    Android Matrix messenger application using the Matrix Rust SDK

    Element X Android is a modern, reimagined Matrix-protocol client designed for Android that provides secure, decentralized communication with a focus on performance, polished UI, and extensibility. Built as the successor to earlier Matrix clients, Element X blends fast native Android development with a feature-rich experience that supports end-to-end encrypted messaging, voice and video calls, threaded conversations, and file sharing across federated Matrix servers. Unlike proprietary...
    Downloads: 13 This Week
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  • 15
    SmsForwarder

    SmsForwarder

    Monitors Android mobile phone text messages, calls, and notifications

    ...The tool’s functionality extends to remote control features, which allow a paired server or client to query messages, calls, contacts, and more.
    Downloads: 20 This Week
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  • 16
    libsignal

    libsignal

    Home to the Signal Protocol and other cryptographic primitives

    libsignal is the foundational cryptographic library that implements the Signal Protocol and other essential primitives used across the official Signal clients and servers, enabling secure end-to-end encrypted communication. Written primarily in Rust with bindings and APIs surfaced for Java, Swift, and TypeScript, this library encapsulates critical algorithms like the Double Ratchet, prekey mechanisms, secure key storage, and zero-knowledge group primitives, along with additional utilities...
    Downloads: 0 This Week
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  • 17
    Ovmeet

    Ovmeet

    Video conferencing and collaboration platform

    OvMeet is a video conferencing and collaboration platform developed in China that supports video meetings and H5 web/video live streaming. WebRTC, RTMP, SIP, RTSP, whiteboards, document presentation, file sharing, desktop sharing, recording, and more. The older version was built using Adobe/Flash, but that is no longer maintained. The newer version uses modern web technologies to deliver video conferencing services across Web, H5, Android, iOS, PC, etc. It also supports server...
    Downloads: 0 This Week
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  • 18
    MadelineProto

    MadelineProto

    Async PHP client/server API for the telegram MTProto protocol

    This library can be used to easily interact with Telegram without the bot API, just like the official apps. It can login with a phone number (MTProto API), or with a bot token (MTProto API, no bot API involved!). Internal peer management: you can provide a simple bot API chat id or a username to send a message or to call other mtproto methods! You can easily login as a user (2FA is supported) or as a bot! Simple error handling! It is highly customizable with a lot of different settings! Bot...
    Downloads: 12 This Week
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  • 19
    Synapse

    Synapse

    Matrix reference homeserver

    Matrix is an ambitious new ecosystem for open federated Instant Messaging and VoIP. Everything in Matrix happens in a room. Rooms are distributed and do not exist on any single server. Rooms can be located using convenience aliases like #matrix:matrix.org or #test:localhost:8448. Synapse is currently in rapid development, but as of version 0.5 we believe it is sufficiently stable to be run as an internet-facing service for real usage! Create and manage fully distributed chat rooms with no...
    Downloads: 5 This Week
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  • 20
    A SSH based chatroom framework; inspired by "ssh-chat" project. This framework support not only the IRC-like command line interface, but also custom clients by providing an API. Unlike the public chat-room of ssh-chat, this implementation requiring all users must be authenticated by public key before starting a chat; however public chatrooms are still possible by hacking OpenSSH server, see Wiki page 'Public Chatroom' for details.
    Downloads: 2 This Week
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  • 21
    JavaComm

    JavaComm

    Desktop communication tool: chat, telephony, multimedia

    JavaComm is a client–server communication platform offering chat, telephony, screen sharing, conferencing, a media player, and configurable media streams. Users can define and manage their own streams for flexible playback. All server-based communication runs over HTTPS (SSL/TLS), while file transfers are handled directly between users without passing through the server.
    Downloads: 2 This Week
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  • 22
    An IRC(u) services server framework written in C++. This server framework is capable of supporting as many individual clients as the protocol supports. Each client can be custom made by subclassing an existing fully functioning client.
    Downloads: 0 This Week
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  • 23
    dxirc
    dxirc is simple IRC client
    Downloads: 5 This Week
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  • 24
    Frost
    Freenet front end written in Java. Supports multiple up/downloads, messages, searching and more.
    Downloads: 77 This Week
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  • 25
    Simple Socket Tool

    Simple Socket Tool

    Application for Server or Client socket/ser. connections (TCP, TLS).

    Application for creating Server or Client socket connections (TCP), and serial connections. Secure client option (TLS 1.2 & 1.3) Possibility to send binary files and a "HEX" mode for send/receive byte values. Handle multiple send areas = easy send different messages. Store the conversation in a binary file. Use the .msi installer on Windows (build-in Java runtime) or Use the .deb installer on Debian-based Linux x86 systems (build-in Java runtime) or use .jar (All OS with Java installed) This option requires Java 1.9 (1.11 recommended for TLS 1.3 support) - if not already installed, download from https://learn.microsoft.com/en-us/java/openjdk/download DOES NOT WORK ON ANDROID. ...
    Downloads: 3 This Week
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