Open Source Kotlin Software - Page 3
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Kotlin Software
Browse free open source Kotlin Software and projects below. Use the toggles on the left to filter open source Kotlin Software by OS, license, language, programming language, and project status.
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1
Image Toolbox
Image Toolbox is an powerful picture editor, which can crop
Image Toolbox is a powerful picture editor, which can crop, apply filters, add some drawings, erase background, edit EXIF, or even create a PDF file. -
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TTS Server
Android system TTS application with Microsoft demo interface
tts-server-android is an Android system TTS application that acts both as a powerful local text-to-speech engine and as a flexible TTS “server” for other apps via HTTP. It includes a built-in Microsoft TTS demo interface and lets users configure custom HTTP requests, making it possible to route TTS through various cloud providers or local servers. The app can import other local TTS engines, giving Android devices a unified interface to multiple voices and providers, and it features simple narration/dialogue detection based on Chinese quotation marks so it can read text with different styles for narration and dialogue. It is built with Kotlin and Jetpack Compose, and the project is structured into multiple libraries (lib-tts, lib-server, lib-compose, lib-database, etc.) to separate UI, server logic, and TTS handling. The app supports advanced features like automatic retry, fallback configurations, text replacement rules, and integrations with reading apps. -
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Aurora Store
Search and download apps from the official Google Play store
Aurora Store is an unofficial, free, and open-source Android client for the Google Play Store that lets users browse, search for, download, and update apps directly from Google’s app catalog without needing the official Play Store app or Google Play Services. It functions like a lightweight alternative store interface, offering app descriptions, screenshots, reviews, and version history, while supporting both personal and anonymous login options so users can choose their level of privacy. The app includes advanced features such as device and locale spoofing, which lets users circumvent regional restrictions and access apps not normally listed for their device or country, as well as integration with privacy tools to reveal embedded trackers in apps. Download management is built in, letting users blacklist updates for specific apps, manually install older versions when necessary, and handle APK files conveniently on their device. -
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Smart AutoClicker
An open-source auto clicker on images for Android
Smart AutoClicker is an Android application allowing to automate repetitive task by clicking automatically for you on the screen. Unlike the regular auto clicker application, the clicks aren't based on timers to execute the clicks. Instead, it allows you to capture an image from a part of your screen and execute the click once this image is detected again. -
Captain Compliance - Data Privacy and Compliance SoftwareCaptain Compliance handles your data privacy requirements so you can be privacy compliant. No more compliance stress, stop stressing over regulatory risks – just privacy protection managed by experts. Our user-friendly platform backed by privacy professionals simplifies the process of navigating regulations, giving your customers transparent choices, and building essential trust for your organization.
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AVNC
VNC Client for Android
Fast & Secure VNC client for Android. AVNC is an open source VNC client for Android. It allows you to remotely control any device running a VNC server. -
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Breezy Weather
A Material Design Weather Application
Breezy Weather is a privacy-focused, open-source Android weather app with a clean and modern interface. It aggregates weather data from various providers while respecting user privacy, offering features like current conditions, forecasts, and weather widgets. The app is designed to be lightweight, customizable, and completely ad-free. -
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Neko
Unofficial MangaDex Reader for Android 7+
A Free, Open source unofficial manga reader for MangaDex. -
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PlainApp
Open-source application that allows you to manage your phone
PlainApp is an open-source application that allows you to manage your phone through a web browser. Access files, videos, music, contacts, sms, calls, and more from your desktop using a secure, easy-to-use web interface. We take your privacy seriously and use TLS + AES-GCM-256 encryption to ensure your data is secure. PlainApp has a modern, customizable interface with multi-language support, light/dark theme options. You can manage your phone from your desktop by visiting a self-hosted webpage wirelessly. -
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SuperImage
Sharpen your low-resolution pictures with the power of AI upscaling
Sharpen your low-resolution pictures with the power of AI upscaling. SuperImage is a neural network-based image upscaling build with the MNN deep learning framework and the Real-ESRGAN algorithm. By leveraging the power of your device's GPU, SuperImage is able to upscale and restore the details of your images without uploading them to the internet, keeping your data secure. SuperImage is a neural network-based image upscaling application for Android built with the MNN deep learning framework and Real-ESRGAN. The input image is processed in tiles on the device GPU, using a pre-trained Real-ESRGAN model. The tiles are then merged into the final high-resolution image. This application requires Vulkan or OpenCL support and Android 7 or above. -
Software for managing apps and accounts | WebCatalogTurn websites into desktop apps with WebCatalog Desktop—your all-in-one tool to manage apps and accounts. Switch between multiple accounts, organize apps by workflow, and access a curated catalog of desktop apps for Mac and Windows.
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AnyClaw
Android app running two AI coding agents with a built-in Linux runtime
openclaw-android-assistant, also known as AnyClaw, is an Android application that packages two AI coding agents into a single mobile app environment. It bundles the OpenClaw personal AI assistant together with the OpenAI Codex CLI so developers can interact with AI agents directly from an Android device. Both agents run inside a self-contained Linux userland that is embedded within the APK, allowing command execution, coding tasks, and agent interactions without requiring root access or external tools. openclaw-android-assistant provides a control dashboard interface where users can manage agents, sessions, skills, and conversations from a unified interface. Through the embedded runtime, the agents can read codebases, write code, and execute shell commands within the packaged Linux environment. It also supports parallel conversations with separate working contexts, enabling multi-threaded development workflows on a mobile device. -
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ReVanced Patcher
ReVanced Patcher used to patch Android applications
Customize your mobile experience through ReVanced by applying patches to your applications. ReVanced was born out of Vanced's discontinuation and it is our goal to continue the legacy of what Vanced left behind. Thanks to ReVanced Patcher, it's possible to create long-lasting patches for nearly any Android app. ReVanced's patching system is designed to allow patches to work on new versions of the apps automatically with bare minimum maintenance. -
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Simple Gallery
A premium app for managing and editing your photos, videos
Simple Gallery brings you all the photo viewing and editing features you have been missing on your Android in one stylish easy-to-use app. Browse, manage, crop and edit photos or videos faster than ever, recover accidentally deleted files or create hidden galleries for your most precious images and videos. And with advanced file support and full customization, finally, your gallery works just the way you want. Turn photo editing into child's play with Simple Gallery's improved file organizer and photo album. Intuitive gestures make it super easy to edit your images on the fly. Crop, flip, rotate and resize pictures or apply stylish filters to make them pop in an instant. Simple Gallery supports a huge variety of different file types including JPEG, PNG, MP4, MKV, RAW, SVG, GIF, Panoramic photos, videos and many more, so you enjoy full flexibility in your choice of format. -
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Spowlo
A Spotify songs downloader for Android made with Jetpack Compose
A Spotify songs downloader powered by spotDL made with Jetpack Compose and Material You. -
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USB Gadget Tool
Convert your Android phone to any USB device you like
Convert your Android phone to any USB device you like. USB Gadget Tool allows you to create and activate USB device roles, like a mouse or a keyboard. Connected USB hosts (e.g. a normal computer) will then identify your Android device only under that role. It can also be used to deactivate the standard USB Gadget (including mtp, adb, etc.), e.g. for security reasons. -
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v2flyNG
A V2Ray client for Android, support v2fly core
v2flyNG is a mobile client that packages the V2Ray/V2Fly networking core into an Android application with a touch-friendly UI. It focuses on making modern protocols—such as VMess, VLESS, and Trojan—accessible without requiring shell access or manual config editing. Profiles can be added via subscription links or QR codes, and the app merges and updates them on schedule to keep node lists fresh. Per-app proxy controls allow you to include or exclude specific applications, which is useful for balancing privacy with bandwidth and latency. The client exposes routing controls, TLS settings, custom DNS, and UDP handling so advanced users can fine-tune behavior. Status panels and logs help diagnose connectivity issues and confirm that rules are being applied as intended. -
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FlashDim
Dim-adjustable flashlight app for Android 13+ with extra modes
FlashDim is a modern flashlight application designed specifically for Android devices running Android 13 or newer. It takes advantage of the platform’s newer hardware flashlight dimming capabilities to let users control flashlight brightness levels beyond a simple on/off state, something stock flashlight tools often don’t offer. Because the dimming support depends on hardware exposure of multiple light levels, full functionality only works on devices that support those features in hardware and system APIs. The app includes a range of additional useful features beyond simple dim control, such as customizable shortcut buttons for brightness presets, specialized flash modes like SOS and Morse code signaling, and timed or beat-based flash patterns. It also supports toggling the flashlight quickly through a quick-settings tile and by double pressing the volume buttons via an accessibility service. FlashDim is designed to be private, ad-free, and offline. -
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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 messaging apps, Element X connects to any compliant Matrix server, letting individuals host their own or join communities without centralized control, while still benefiting from robust cryptographic protections that ensure only intended recipients can read conversations. The app’s UI emphasizes responsiveness and ease of use with modern navigation patterns, customizable themes, and intuitive controls for group chats and spaces (Matrix’s equivalent of servers or room collections). -
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Unciv
Open-source Android/Desktop remake of Civ V
Unciv is an open-source reimplementation of the game Civilization V in Java using LibGDX. It focuses on replicating the core gameplay mechanics in a lightweight, mobile- and desktop-friendly format, supporting both single-player and multiplayer modes. Unciv uses a minimalist art style and text-based UI to deliver a fast, turn-based strategy experience. -
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Droid-ify
F-Droid client with Material UI
A quick material F-Droid client. -
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Legado
Legado 3.0 Book Reader with powerful controls & full functions
legado is a feature-rich open-source ebook reader for Android, focused on flexibility, extensibility, and customization. It supports local books, online book sources, and plugins for a personalized reading experience. With powerful configuration options, including layout settings, font control, and background customization, it’s ideal for avid readers looking for complete control over how they read digital content. -
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Aplicación para sistemas Windows y Android sin fines de lucro, con el propósito de fomentar el estudio bíblico libre. El uso del código del programa está permitido conforme a las siguientes reglas: https://github.com/baruc78pro/Biblia-de-estudio 1.-Prohibido el uso para robo o mal manejo de datos Queda estrictamente prohibido utilizar el código con fines de robo, extracción o uso indebido de datos. Todos los datos deben ser almacenados de manera forzosa y exclusivamente en local, sin conexión a servidores externos ni servicios de terceros. 2.-Uso exclusivo para el cristianismo evangélico Este software ha sido diseñado como una herramienta de apoyo para el estudio bíblico dentro del cristianismo evangélico. El uso del programa con fines católicos o vinculados a cualquier otra religión queda terminantemente prohibido(el catolicismo no se considera cristianismo). Malware Inc. podrá revocar el acceso, retirar el software e iniciar procedimientos legales si detecta un uso indebido
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AnkiDroid
Anki flashcards on Android
Anki flashcards on Android. Your secret trick to achieve superhuman information retention. A semi-official port of the open source Anki spaced repetition flashcard system to Android. Memorize anything with AnkiDroid. -
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Iconify
Iconify lets you customize your Android 12+ device easily
Iconify is an open-source Android customization app that provides users with deep control over the look and feel of their Android device’s interface, enabling changes to icons, colors, shapes, and even elements of the notification panel on Android 12 and above. The application focuses on letting users personalize UI components without requiring extensive technical knowledge, offering a range of theming options that can radically alter the aesthetic of app icons and system visuals for a more tailored user experience. Although the repository was archived in mid-2025, it amassed a significant community of users and contributors interested in device theming and modular customization techniques. As an archived project, Iconify’s design and codebase remain available for developers who want to build on its ideas, port features to other customization frameworks, or fork the project for new directions. -
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fanqiang
Over the Wall - Science Online
Over the wall-Scientific Internet, over-the-wall tool, over-the-wall tutorial project library. -
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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.
