Open Source Android Communications Apps - Page 2
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Communications Apps for Android
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Simple Contacts
Easy and quick contact management with no ads, handles groups
A lightweight smart contact app for managing your contacts loved by millions of people. The contacts can either be stored on your device only, or they can also be synchronized by different means. This phone number smart contact phone book will help you keep your contacts in one place without the hassle of backing up your contacts as the contacts backup are always in sync with the contacts you add. This app light on space and is effective when you have to make contacts backup and keep a phone book that will help you in smart contact keeping. You can use it for managing user emails and events too. It has the ability to sort/filter by multiple parameters, and optionally display surname as the first name. This way, you can achieve smart contact retrieval in a quick way. You don't have to scroll down to find your required contact. Moreover, whenever you add a new contact, the contacts backup automatically ensuring the integrity of contacts. -
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SmsForwarder
Monitors Android mobile phone text messages, calls, and notifications
SmsForwarder is an Android application designed to monitor incoming communications such as SMS messages, phone calls, and app notifications, and then automatically forward them to configured destinations based on user-defined rules, making it ideal for remote monitoring, backup, or automation scenarios. Users can set custom logic so that certain messages or notifications trigger forwarding to group chat bots (like DingTalk or enterprise WeChat), webhook endpoints, email, push services (PushPlus, Bark), Telegram bots, and other channels, allowing flexible integration with communication workflows. In addition to basic forwarding, the app’s rule-based engine can filter messages, enabling selective forwarding based on content, sender, or event type, and it can even push details like call logs or device battery status. The tool’s functionality extends to remote control features, which allow a paired server or client to query messages, calls, contacts, and more. -
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Thunderbird for Android
Open Source Email App for Android (fka K-9 Mail)
Thunderbird Android is the mobile counterpart of the popular Thunderbird email client, reimagined for Android phones and tablets so users can access, send, and organize email from multiple accounts with advanced features found in desktop clients. It embraces modern mobile UI design while supporting robust email protocols (IMAP/POP3) and standards like OAuth for secure logins to services such as Gmail, Outlook, or custom mail providers. The app is built to handle complex mailbox structures, threaded discussions, rich text and HTML content, attachments, and account synchronizations reliably even on cellular connections. With features like unified inboxes, background fetch, push notifications, and configurable swipe actions, Thunderbird Android aims to bring the power and flexibility of the desktop experience to your pocket. It also integrates search, filtering, and tagging capabilities that help users stay organized when managing large volumes of mail. -
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ble
Connect to and interact with Bluetooth LE peripherals
BLE is a NativeScript plugin for Bluetooth Low Energy (BLE) communication, enabling mobile apps to interact with Bluetooth devices. It supports connecting, reading, writing, and receiving notifications from BLE peripherals. -
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Repeater-START
Showing The Amateur radio Repeaters Tool
Repeater-START (Showing The Amateur Repeaters Tool) is an app to view nearby ham radio repeaters. It runs on Windows, Android, Ubuntu Linux and Raspbian for Raspberry-pi, Librem Phone, Pinephone/Manjaro Linux etc. -
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FreshRSS
A free, self-hostable news aggregator
FreshRSS is a self-hosted RSS and Atom feed aggregator. It is lightweight, easy to work with, powerful, and customizable. Follow websites, podcasts, and video channels in a single place. Read your articles directly in FreshRSS. Search and save queries for quick access. Generate feeds by scraping external websites. Generate new feeds based on your filters. Import and export your feeds with OPML. Stay connected to your feeds in real time. Adapt to your needs thanks to a lot of options. Follow your feeds with or without a third-party application. FreshRSS can manage 1M+ articles and 50k+ feeds without complaining. Customize FreshRSS with themes and extensions. FreshRSS is translated in more than 15 languages. FreshRSS is an RSS aggregator and reader. It allows you to read and follow several news websites at a glance without the need to browse from one website to another. -
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PikaTorrent
Just pick a Torrent, stream and download on all your devices
PikaTorrent is a modern, cross-platform BitTorrent client designed for ease of use across desktop and mobile devices. Developed using Flutter, it offers a unified experience on Windows, Linux, Android, and plans for macOS and iOS. PikaTorrent emphasizes user-friendliness, allowing users to stream and download torrents seamlessly, with features like remote management and dark mode support enhancing the overall experience. -
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QKSMS
A beautiful SMS messenger for Android
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! -
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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. A third-party unsupported DynamoDB adapter also exists. Other databases can be supported by writing custom adapters. Tinode is not XMPP/Jabber. It is not compatible with XMPP. It's meant as a replacement for XMPP. On the surface, it's a lot like open source WhatsApp or Telegram. Version 0.17. This is beta-quality software, feature-complete and stable but probably with a few bugs. Follow instructions to install and run or use one of the cloud services provided. -
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cpprestsdk
Microsoft project for cloud-based client-server communication
The C++ REST SDK is a Microsoft project for cloud-based client-server communication in native code using a modern asynchronous C++ API design. This project aims to help C++ developers connect to and interact with services. cpprestsdk is in maintenance mode and we do not recommend its use in new projects. We will continue to fix critical bugs and address security issues. Once you have the library, look at our tutorial to use the http_client. It walks through how to setup a project to use the C++ Rest SDK and make a basic Http request. HTTP client/server, JSON, URI, asynchronous streams, WebSockets client, oAuth. A powerful model for composing asynchronous operations based on C++ 11 features. Windows desktop, Windows Store (UWP), Linux, OS X, Unix, iOS, and Android. Support for Visual Studio 2015 and 2017 with debugger visualizers. -
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SPICE Program Applications
The USAID-funded SPICE program, implemented by the Open Institute.
The USAID-funded SPICE program, implemented by the Cambodian NGO Open Institute, facilitated from 2012 to 2015 social and business innovation using communications technology and improved communications in Khmer via mobile devices. The purpose of the program was to build on partnerships between technology-oriented civil society organizations (CSOs) and private sector entities to utilize existing technologies to promote and deliver a greater diversity of information to the public, improve communications in Khmer using mobile devices, and increase the capacity of CSOs to use social media for development purposes. Other documents of the SPICE program can be found in http://spiceprogram.sourceforge.net -
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Project Libre
An open platform for chat bots, virtual agents, live chat, and more
Project Libre is an open platform for chat bots, virtual agents, live chat, and more. It includes web and mobile services for Java, Android, iOS, and JavaScript. Project Libre includes an API, SDK, and user interface for live chat, chatrooms, forums, chat bots, virtual agents, and other services supported by the Bot Libre and Paphus servers. The hosted servers include: BOT libre! - http://www.botlibre.com - free chat bot creation and hosting platform FORUMs libre! - http://www.forumslibre.com - free embeddable forums LIVE CHAT libre! - http://www.livechatlibre.com - free live chat and chatrooms Paphus Live Chat - http://www.paphuslivechat.com - commercial live chat, chatroom, forums, and chat bot hosting service Also hosted on GitHub, https://github.com/paphus/Project-Libre -
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Android Upload Service
Easily upload files in the background with progress notification
Easily upload files (Multipart/Binary/FTP out of the box) in the background with progress notification. Support for persistent upload requests, customizations and custom plugins. At the core of the library, there is a Service that handles multiple concurrent upload tasks in the background. It publishes broadcast intents to notify status. This way the logic is completely decoupled from the UI. You are safe launching upload requests from your fragments, activities and services without worrying about locking the thread in which you are. Check the wiki to learn how you can use it in your App. You are also safe if your app is put in the background. All the uploads will continue to be executed also when your device is idle. Bear in mind that if you kill your app, the service gets killed as well, as it's attached to your app's process and all the currently running uploads will be terminated abruptly. -
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Bitchat
Bluetooth mesh chat, IRC vibes
BitChat is a decentralized, peer-to-peer encrypted messaging app built by Jack Dorsey’s Permissionless Tech. It uses Bluetooth Low Energy mesh networking to relay messages without internet, servers, accounts, or phone numbers. Messages are end-to-end encrypted (Curve25519 + AES‑GCM) and the app includes a panic mode to erase data quickly. -
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Free Responsive HTML Email Template
A free simple responsive HTML email template
Sometimes you just want to send a simple HTML email with a simple design and clear call to action. This is it. This is a really simple email template. Its sole purpose is to get the recipient to click the button with no distractions. Save yourself the pain of coding HTML email and download email templates. There are over 30+ major email clients using different rendering engines and various email providers like Outlook, Gmail, Apple, Yahoo Mail. Email requires special development skills. It is important to consider the experience for iOS and Android users if you really want to get your return on investment. A broken mobile experience can break your campaign. You have a lot to do. You have websites to design, code to test, products to ship, campaigns to send. That's why these templates were created, to save you time. These HTML email templates have been tried and tested across all major email clients. -
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K-9 Mail
Open Source Email App for Android
K-9 Mail is an advanced, open-source email client for Android that's focused on making it easy to chew through large volumes of email. It's designed to be easy to use by both novice and power users, with plenty of useful features. It has IMAP push email support, support for multiple accounts, support for POP3 and Exchange 2003/2007 (with WebDAV), flagging, filing, signatures and more! K-9 Mail also offers a light and dark theme, keyboard shortcuts and emoji support. Like man's best friend, K-9 Mail is an email client you can depend on, and will surely be your best friend when it comes to handling your emails! -
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bitchat
bluetooth mesh chat, IRC vibes
bitchat is a decentralized peer-to-peer messaging app that operates over Bluetooth mesh networks, enabling local group chats without the need for internet, servers, or phone numbers. It is designed with privacy and security in mind, offering encrypted private messages and channels alongside a public local chat that requires no registration. -
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SIM Explorer
Sim Card explorer and decoder
This software uses your smart card reader/terminal to navigate through the SIM Card directory tree. The contents of the files are decoded and showed to the user. Other features, such as CHV management and SIM backup, are also available. -
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Serial port assistant This is only a read-only mirror repository. Main repository: https://github.com/KangLin/SerialPortAssistant
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Sharik - file sharing via WI-FI
Sharik lets you easily share files within your local network
Sharik is an open-source, cross-platform solution for sharing files via Wi-Fi or Mobile Hotspot. This app allows you to easily send photos, apps, files, text, literally anything, to any kind of device connected to the same network. It's convenient and blazing fast. Sharik is entirely free to use, and it contains no ads. Moreover, its source code is published on GitHub so that everyone can contribute to the development process. So, if you like it, please leave a star on our GitHub repository, and consider contributing: add a new language or help us with code. YOU CAN SEND: 1. Photos (jpg, png, gif, etc) 2. Applications (apk) 3. Files (zip, rar, 7z, pdf, etc) 4. Text GitHub page: https://github.com/marchellodev/sharik Download Sharik right now! -
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HP Socket
High Performance TCP/UDP/HTTP communication component
Server Based on IOCP/EPOLL communication model, combined with technology of memory pool, private heap etc., efficient memory management is implemented to support large scale and high concurrent communication scenarios. Agent The Agent component is essentially a Multi-Client component that uses the same technical architecture as the Server component. An Agent component object can create and efficiently handle large-scale Socket connections at the same time. Client Based on Event-Select/POLL communication model, each component object creates a communication thread and manages a Socket connection. Client components are suitable for small-scale client scenarios. -
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RSSHub
Easy to use, and easy to extend RSS generator
RSSHub is an open source, easy to use, and easy to extend RSS generator that can generate RSS feeds for any weird content. RSSHub is developing rapidly with the help of the open source community, and has now adapted thousands of content from hundreds of websites. RSSHub Radar can be extended with the browser (opens new window) and mobile auxiliary App RSSBud (opens new window)(iOS) and RSSAid (opens new window)(Android) Edible. RSSHub delivers millions of contents aggregated from all kinds of sources, our vibrant open source community is ensuring the deliver of RSSHub's new routes, new features and bug fixes. In addition RSSHub supports many useful parameters, such as content filtering, text output, etc., can be common parameters for specific use documents. -
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Read You
An Android RSS reader presented in Material You style
An Android RSS reader presented in Material You style. -
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Signal
A private messenger for Android
Signal-Android is the official open-source Android client for Signal, a secure messaging app focused on end-to-end encryption and privacy. Developed by the Signal Foundation, it enables private messaging, voice, and video calls, without storing user data. Signal uses the Signal Protocol for encryption and does not collect metadata, making it one of the most privacy-focused communication platforms available.
