Appwrite® - complete cloud infrastructure for your web, mobile and AI apps. Including Auth, Databases, Storage, Functions, Messaging, Hosting, Realtime and more

Telegram Desktop messaging app

A lightweight alternative to OpenClaw that runs in containers for security. Connects to WhatsApp, Telegram, Slack, Discord, Gmail and other messaging apps,, has memory, scheduled jobs, and runs directly on Anthropic's Agents SDK

Botkit is an open source developer tool for building chat bots, apps and custom integrations for major messaging platforms.

SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!

Berty is a secure peer-to-peer messaging app that works with or without internet access, cellular data or trust in the network

Free and Open Source messaging and emailing app that combines common web applications into one.

Franz is a free messaging app for services like WhatsApp, Slack, Messenger and many more.

An IM App like WeChat App has to send text, pictures, audio, video, location messaging, managing local address book, share a circle of friends, drifting friends, shake a fun and more interesting features.

Growl-style alerts and messages for your app. #hubspot-open-source

Message passing between iOS apps and extensions.

:mega: Whisper is a component that will make the task of display messages and in-app notifications simple. It has three different views inside

A decentralized messaging and sharing app built on top of Secure Scuttlebutt (SSB).

The SMS Gateway for Android™ app enables sending and receiving SMS messages through an API that can be accessed directly on the device or via a cloud server when direct device access is not possible.

Open-source customer engagement. Automate transactional and marketing messages across email, SMS, mobile push, WhatsApp, Slack, and more 📨

Chat SDK (IM SDK) — Build in-app messaging with chat API, UIKit & send message capabilities. Supports Android, iOS, Flutter, Web, React Native, uni-app, HarmonyOS & more. Features: one-to-one chat, group chat, message push, real-time messaging, offline push, chat UI components.

A framework for building messaging apps with .NET and C#.

Open-Source Messaging App

:speech_balloon: Android Chat SDK ➜ Stream Chat API. UI component libraries for chat apps. Kotlin & Jetpack Compose messaging SDK for Android chat

💨 A real time messaging system to build a scalable in-app notifications, multiplayer games, chat apps in web and mobile apps.

No description available

Easy to use fansly.com content downloading tool. Written in python, but ships as a standalone Executable App for Windows too. Enjoy your Fansly content offline anytime, anywhere in the highest possible content resolution! Fully customizable to download in bulk or single: photos, videos & audio from timeline, messages, collection & specific posts 👍

A macOS app that provides an MCP server to your Messages, Contacts, Reminders and more

Fake Clone of Cash App with Custom Balance and Custom Sent Message. (Released)

An app for creating push notifications for new messages posted to gotify/server.

Tweak Google apps (e.g., Phone and Messages) to unlock hidden features (e.g., available only in some countries or on certain devices). Root is required.

A personal 24x7 AI assistant like OpenClaw that runs on your messaging platforms. Send a message on WhatsApp, Telegram, Signal, or iMessage and get responses from Claude with full tool access, persistent memory, scheduled reminders, and integrations with 500+ apps.

💬 React-Native Chat SDK ➜ Stream Chat. Includes a tutorial on building your own chat app experience using React-Native, React-Navigation and Stream

Captures your web app's complete development timeline - server logs, browser events, console messages, network requests, and automatic screenshots - in a unified, timestamped feed for AI debugging.

An API to interact with the popular messaging app Discord