Open Source Kotlin Internet Software
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Kotlin Internet Software
View 9152 business solutionsBrowse free open source Kotlin Internet Software and projects below. Use the toggles on the left to filter open source Kotlin Internet Software by OS, license, language, programming language, and project status.
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v2rayNG
A V2Ray client for Android, support Xray core and v2fly core
A V2Ray client for Android supports Xray core and v2fly core. geoip.dat and geosite.dat files are in Android/data/com.v2ray.ang/files/assets (path may differ on some Android devices). Download feature will get an enhanced version in this repo (Note it need a working proxy). The latest official domain list and ip list can be imported manually. It's possible to use third-party dat files in the same folder, like h2y. Android projects under V2rayNG folder can be compiled directly in Android Studio or using Gradle wrapper. But the v2ray core inside the aar is (probably) outdated. The aar can be compiled from the Golang project under AndroidLibV2rayLite folder. v2rayNG can run on Android Emulators. But VPN mode will not work if the system doesn't support it. -
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TG WS Proxy Android
Android local MTProto proxy server to bypass Telegram loading issues
TG WS Proxy Android is an Android-based local MTProto proxy application designed to improve Telegram connectivity and bypass network restrictions using secure WebSocket connections. Built as a fork of Flowseal’s tg-ws-proxy project, the app routes Telegram traffic through Cloudflare WebSocket tunnels or directly to Telegram data centers for improved stability and performance. The application runs a local MTProto proxy powered by a native Go engine and integrates directly with compatible Telegram clients for quick setup. Designed with a modern Material 3 interface and Jetpack Compose, it provides an intuitive user experience alongside advanced networking features. TG WS Proxy Android also includes background service support, real-time connection logs, automatic updates, and customizable themes for better usability on mobile devices. -
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NekoBox for Android
NekoBox for Android / sing-box / universal proxy toolchain for Android
NekoBoxForAndroid is an Android-based proxy client supporting popular protocols like V2Ray, XRay, and Shadowsocks for secure, privacy-focused internet access. Designed as a modern alternative to applications like V2rayNG, it provides a clean interface, enhanced performance, and robust configuration management for circumventing censorship and accessing restricted content. -
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Clash Meta for Android
A rule-based tunnel for Android
Clash Meta for Android is an Android application that functions as a rule-based network tunneling and proxy management tool, enabling users to control how their internet traffic is routed through different proxy servers. Built on the Clash.Meta core, it allows advanced routing based on customizable rules, making it possible to selectively direct traffic for specific apps, domains, or regions. The application is commonly used for bypassing network restrictions, optimizing routing performance, and managing multiple proxy configurations in a unified interface. It provides a user-friendly mobile interface while maintaining powerful underlying functionality for advanced users who need granular control over network behavior. The project is actively maintained and integrates updates from the Clash.Meta kernel, ensuring compatibility with evolving proxy protocols and features. It supports various proxy types and configurations, making it highly flexible for different networking scenarios. -
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WG Tunnel Desktop
A WireGuard and AmneziaWG client for desktop with a kill switch.
WG Tunnel Desktop is a free and open-source desktop client for managing WireGuard and AmneziaWG VPN tunnel configurations. It is designed for users who want a flexible desktop VPN tool with strong privacy controls and support for modern tunneling protocols. The application supports Windows and Linux, with macOS support planned for the future. WG Tunnel Desktop runs tunnels through a system daemon, allowing VPN connections to operate independently from the graphical interface. It includes security-focused tools such as an independent lockdown mode, encrypted configuration storage, and tunnel restoration on boot. With import, export, editing, sorting, and live statistics features, WG Tunnel Desktop provides a practical way to manage secure VPN connections on desktop systems. -
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AmneziaWG for Android
Android GUI for AmneziaWG
AmneziaWG for Android is the Android graphical client for AmneziaWG. It provides a mobile interface for using the AmneziaWG protocol on Android devices. The project is built around a native Android codebase using Kotlin and Java. It includes the tunnel and UI components needed to manage AmneziaWG connections from a phone or tablet. The repository supports building from source with Gradle and submodules, which makes it useful for developers who want to inspect, customize, or package the client themselves. It is best suited for users and maintainers who need an Android-facing companion to the AmneziaWG protocol rather than a general-purpose VPN framework. -
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WG Tunnel APK
FOSS WireGuard & AmneziaWG Android client with auto-tunneling
WG Tunnel is a free and open-source Android VPN client designed for WireGuard and AmneziaWG connections. It extends the capabilities of the official WireGuard app by adding advanced privacy, automation, and network management features. The application supports automatic tunnel activation based on network conditions, helping users maintain secure connections without manual intervention. WG Tunnel includes tools such as split tunneling, lockdown mode, and local proxy support to provide greater control over network traffic. Built for both smartphones and Android TV devices, it delivers a flexible and user-friendly VPN experience. Its focus on privacy, censorship resistance, and customization makes it a powerful solution for secure internet access. -
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Suwayomi-Server
A rewrite of Tachiyomi for the Desktop
A free and open source manga reader server that runs extensions built for Tachiyomi. Suwayomi is an independent Tachiyomi compatible software and is not a Fork of Tachiyomi. Suwayomi-Server is as multi-platform as you can get. Any platform that runs java and/or has a modern browser can run it. This includes Windows, Linux, macOS, chrome OS, etc. Follow Downloading and Running the app for installation instructions. -
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Firefox for Android
Firefox for Android
Shortcut the internet with Firefox for Android. See all your open tabs, recent searches and favorite sites all in one place with Firefox browser for Android. Firefox for Android delivers effortless privacy protection with lighting-fast page loads. Enhanced Tracking Protection automatically blocks online trackers from following you around the web and slowing down your pages. Get to Private Browsing Mode with just one tap. And when you close Private Browsing Mode, your browsing history is automatically erased from your device. Got a big phone and normal sized thumbs? No problem. Firefox for Android lets you move the search bar from the top to the bottom making it easier to use with one hand. You can also choose your own search engine within the browser, and set Firefox as your default browser if you want. Switch to Dark Mode any time to reduce eye strain and prolong your battery power. -
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EinkBro
A small, fast web browser based on Android WebView
EinkBro is designed to fit Eink devices' needs; no unnecessary UI transitions and animations, clear B&W icons, and useful features for Eink reading experience. It's originated from FOSS Browser, which is a fully free/libre (as in freedom) Android app. -
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Android GUI for WireGuard
Android GUI for WireGuard
Android GUI for WireGuard is the official Android client for the WireGuard VPN protocol, providing a secure and efficient mobile interface for managing encrypted tunnels. The application is written primarily in Kotlin and integrates closely with Android’s VPN framework to deliver stable, battery-efficient connections. It allows users to create, import, and manage tunnel configurations through a clean graphical interface while maintaining WireGuard’s minimalist cryptographic design. The client supports QR code import and seamless switching between multiple tunnels, making it practical for both personal and enterprise use cases. Because WireGuard emphasizes a small and auditable codebase, the Android implementation inherits strong security properties alongside excellent performance. Overall, wireguard-android is intended for Android users and mobile administrators who need a fast, modern VPN client with straightforward configuration. -
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SagerNet
The universal proxy toolchain for Android
The universal proxy toolchain for Android, written in Kotlin. To use hysteria plugin with version smaller than 1.2.1, the highest compatible version of SagerNet is 0.8.1-rc02. The new protocol is designed to improve UDP performance and provide full replay protection. Using an MTU larger than the upstream interface will only improve speed in some scenarios and may result in UDP packet loss. According to the gfw.report et al's research, when connecting to the impacted VPSs, GFW is likely to block binary protocols unless it is an HTTP, TLS, or SSH connection, or the first 6 bytes of data sent from client to server can be interpreted as printable characters. This suggests in addition to TLS encryption, HTTP Header, this kind of censorship can also be temporarily evaded by only sending printable characters in the first 6 bytes of data. -
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Kitsunebi
A fully-featured V2Ray client for Android
A fully-featured V2Ray client for Android. The Core used by Kitsunebi extends the function of v2ray-core, and adds a strategy of selecting the fastest node according to the node delay value. You can add a node group on the graphical interface to enable it. If you use custom configuration, there are several configuration items, except for tolerance. The delay test is not ICMP Ping or TCP Ping, the method used is roughly the same as that used by the latency strategy in load balancing, actually sends a proxy request to outbound, and records the time it takes to return non-null data. The delay test is also equivalent to the availability or connectivity test. As long as the delay can be measured, it means that the node is available. If it cannot be measured or times out, the availability is unknown. -
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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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FlClashM
Android mihomo client with built-in censorship circumvention
FlClashM is an open-source Android client for mihomo, based on FlClashX. It brings advanced censorship-circumvention tools into one app and keeps everyday use simple: import a YAML profile, choose the route, and connect. Profiles can use built-in ByeDPI, OlcRTC, StormDNS, and NaiveProxy nodes alongside standard mihomo proxies and rules. FlClashM also supports per-app split tunneling, QR/file/URL profile import, Android TV transfer, Quick Settings tiles and widgets, signed in-app updates, subscription expiry notifications, and automatic VPN startup after reboot. Download ready-to-install APKs here on SourceForge. Source code, documentation, issue tracker, and release notes are available on GitHub. -
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gradle-buildconfig-plugin
A plugin for generating BuildConstants for any kind of Gradle projects
A plugin for generating BuildConstants for any kind of Gradle project, Java, Kotlin, Android, Groovy, etc. Designed for KTS scripts, with experimental support for Kotlin's multi-platform plugin. -
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Chucker
An HTTP inspector for Android & OkHTTP (like Charles but on device)
Chucker simplifies the inspection of HTTP(S) requests/responses fired by your Android App. Chucker works as an OkHttp Interceptor persisting all those events inside your application, and providing a UI for inspecting and sharing their content. Apps using Chucker will display a notification showing a summary of ongoing HTTP activity. Tapping on the notification launches the full Chucker UI. Apps can optionally suppress the notification, and launch the Chucker UI directly from within their own interface. -
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Facebook SDK for Android
Used to integrate Android apps with Facebook Platform
This open-source library allows you to integrate Facebook into your Android app. Integrate your Android app with Facebook to build engaging social apps by using the Facebook SDK for Android. To learn more about using Facebook development tools. The current version of the Facebook SDK for Android is version 11.2.0 and requires the Android API 15. Code and samples for the Facebook SDK for Android are available on GitHub. A secure and convenient way for people to log into your app or website by using their Facebook credentials. Enable people to post to Facebook from your app. People can share, send a message, and share to stories. Understand people's actions in your app and measure the effectiveness of your Mobile App Ads. Get data in and out of Facebook's social graph, query data, post stories, upload photos and perform other tasks. -
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HTTP Shortcuts for Android
Android app to create home screen shortcuts
A simple Android app that allows you to create shortcuts that can be placed on your home screen. Each shortcut, when clicked, triggers an HTTP request, with the possibility to process and display the response in various ways. Run arbitrary JavaScript before & after execution, which allows for lots of customization with features such as compute values such as timestamps, random numbers, UUIDs, hashes, HMACs, base64, etc. Parse JSON or XML and extract data from them. Show toast message or message dialogs. Vibrate or play notification sounds. Trigger other shortcuts to chain multiple HTTP requests. Interact with other devices and services by sending TCP or UDP packets, MQTT messages or using Wake-on-LAN. -
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Ktorfit
HTTP client generator / KSP plugin for Kotlin Multiplatform
Ktorfit is a HTTP client/Kotlin Symbol Processor for Kotlin Multiplatform (Android, iOS, Js, Jvm, Linux) using KSP and Ktor clients inspired by Retrofit. -
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Kuroba Experimental
Free and open source image board browser
KurobaEx is a fast Android app for browsing imageboards, such as 4chan and 8chan. It's a fork of Kuroba. Ability to attach multiple media files to reply, attach media files that were shared by external apps (even by some keyboards), attach remote media files by URL, etc. New image downloader. Allows downloading images while the app is in the background, retrying failed to download images, resolving duplicates, etc. -
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OwnTracks for Android
OwnTracks Android App
OwnTracks allows you to keep track of your own location. You can build your private location diary or share it with your family and friends. OwnTracks is open-source and uses open protocols for communication so you can be sure your data stays secure and private. This is the OwnTracks Android app. See our booklet for details on how to get started with OwnTracks, as well some details about behaviour specific to the Android app. -
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Scarlet
A Retrofit inspired WebSocket client for Kotlin, Java, and Android
A Retrofit-inspired WebSocket client for Kotlin, Java, and Android. We are working on a new version of Scarlet that supports other persistent connection protocols: ServerSentEvent, Socket IO, STOMP, and MQTT. It can be found on the 0.2.x branch. -
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kcptun for Android
Android plugin that brings kcptun acceleration support
kcptun for Android is an Android plugin that brings kcptun acceleration support to the Shadowsocks Android ecosystem. It is designed as a SIP003 plugin, which means it can be used alongside shadowsocks-android rather than functioning as a standalone VPN client. The project packages kcptun client functionality for Android users who want to route Shadowsocks traffic through a KCP-based transport layer. Its main purpose is to improve connection behavior in unstable or high-latency network conditions by using kcptun’s reliable UDP tunneling approach. The repository includes Android application code, plugin integration files, and localization support through the same translation process used by shadowsocks-android. It is best understood as a specialized networking companion for users who already understand Shadowsocks and kcptun configuration. -
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SNI Cloudflare MASQUE All Countries
Value Added Warp over WebSocket via CDN Tunnel
UDP Over SSL Tunnel UDP Over SSL Tunnel is a free SSL tool with SNI Host (Spoof Host) support ( SSL Injector ). Warp-over-WebSocket-CDN Bypass ISP throttling and DPI by tunneling Cloudflare Warp traffic over WebSocket with Host Header spoofing through major CDN networks (CloudFront / Cloudflare / Akamai). Platform Protocol Tunnel License What It Does Many ISPs throttle or block VPN traffic using Deep Packet Inspection (DPI). Warp-over-WebSocket-CDN wraps WireGuard UDP inside a WebSocket connection with a spoofed Host header, routing traffic through major CDN edge networks (CloudFront, Cloudflare, or Akamai). To any firewall or DPI system, the traffic looks like a legitimate WebSocket upgrade to a CDN-hosted domain. Result: Full Cloudflare Warp speed and privacy, even on heavily restricted networks — including campus, corporate, and ISP-level DPI systems.
