meshtastic / Meshtastic-Android

Android application for Meshtastic

GetStream / stream-chat-android

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

torlando-tech / columba

Native Android messaging app using Bluetooth LE, TCP, or RNode (LoRa) over LXMF and Reticulum

threema-ch / threema-android

Threema App for Android.

cometchat / cometchat-uikit-android

Voice & Video Calling and Text Chat App Android

OneSignal / OneSignal-Android-SDK

OneSignal makes engaging customers simple and is the fastest, most reliable service to send push notifications, in-app messages, SMS, and emails. This plugin makes it easy to integrate your native Android or Amazon app with OneSignal. https://onesignal.com

SimonMarquis / FCM-toolbox

📲 Firebase Cloud Messaging toolbox

an1ndra / Messages

An offline SMS messaging app for Android that clones the UI of Google Messages. Built with Kotlin + Jetpack Compose + Material 3 (M3). No internet permission — everything is local SMS + local database.