Open Source Kotlin Internet Software
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Kotlin Internet Software
View 8754 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 But the v2ray core inside the aar is (probably) outdated.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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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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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. -
Application Monitoring That Won't Slow Your App DownFull APM with errors, performance, logs, and uptime monitoring. 99.999% uptime SLA on the platform itself.
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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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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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MEGA Android Client
MEGA Android App
A fully-featured client to access your Cloud Storage provided by MEGA. -
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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. -
Custom VMs From 1 to 96 vCPUs With 99.95% UptimeLive migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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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. -
11
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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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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Elixir plugin for JetBrain's IntelliJ
Elixir plugin for JetBrain's IntelliJ Platform (including Rubymine)
The plugin works both in the rich IDEs that allow alternative language SDK selection and small IDEs that are language specific. The rich IDEs work best for IntelliJ Elixir because only in the rich IDEs can have an Elixir SDK set as the Project SDK. In all small IDEs, the native language SDK is always there, which makes anything that uses the SDK, such as running elixir, erl, or mix more complicated both internally and externally in the configuration you have to setup. The plugin will automatically find the newest version of Elixir installed. (NOTE: SDK detection only works for Linux, homebrew installs on OSX, and Windows. Open an issue with information about Elixir install locations on your operating system and package manager to have SDK detection added for it.) If the automatic detection doesn't find your Elixir SDK or you want to use an older version, manually select select the directory above the bin directory. -
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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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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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Proton Drive for Android
Android client codebase for accessing Proton Drive
Proton Drive for Android is Proton’s official Android client codebase for accessing Proton Drive from phones and tablets, built as a full native Android application that you can compile and run in Android Studio or from the command line. The repository is structured like a typical production Android app with a Gradle-driven build, and its setup guidance emphasizes straightforward local development workflows as well as headless builds for CI-style environments. It is designed to plug into Proton Drive’s broader ecosystem so users can manage their cloud-stored files from an Android interface while keeping the client implementation transparent and reviewable as open source. The project documentation focuses on developer setup details such as SDK configuration and build commands, which is especially useful for engineers auditing or reproducing official builds. -
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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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http4k
The Functional toolkit for Kotlin HTTP applications
http4k is a lightweight but fully-featured HTTP toolkit written in pure Kotlin that enables the serving and consuming of HTTP services in a functional and consistent way. http4k applications are just Kotlin functions. http4k consists of a lightweight core library, http4k-core, providing a base HTTP implementation and Server/Client implementations based on the JDK classes. Further servers, clients, serverless, templating, websockets capabilities are then implemented in add-on modules. http4k apps can be simply mounted into a running Server, Serverless platform, or compiled to GraalVM and run as a super-lightweight binary. Apart the from Kotlin StdLib, http4k-core module has ZERO dependencies and weighs in at ~1mb. Add-on modules only have dependencies required for specific implementation. -
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McImage
Auto Check big images and compress images in building
Android Gradle Plugin. Auto Check big images and compress images in building. McImage is a Non-invasive plugin for compressing all res in your project. Version 1.0.1 now supports all build.gradle version! Already supports mavenCentral. Compress all png and jpg, every img can save %70 in size. It is possible to convert imgages to webp (after v0.0.3 support) Auto match the system which you build your project. Support includes Linux, Mac OS X and Windows (after v0.0.4 support) Use this plugin only if you need one line code. -
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SmartCookieWeb
A secure, open source web browser for Android
An open-source web browser with privacy on by default. Customize and configure the browser to make it your own. You have a right to privacy, which is why SmartCookieWeb does not and will never collect your data or information on your web activity. All browser source code is open-source on GitHub. Fast and light. Completely free and ad-free. Disable images, block JavaScript and change the browser user agent. Customize navbar color, add a secondary navbar and set a homepage background. Allow location access, remove identifying HTTP headers and block HTTP sites. View the source code of a webpage and run JavaScript in the console. Google is the default search engine in SmartCookieWeb, as it's what most people use, but there are 10 other built-in search engines. SmartCookieWeb also never stores any personally identifiable information. SmartCookieWeb doesn't send any data at all to CookieJarApps. -
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Twidere for Android
Material Design ready and feature rich app for Android
Material Design ready and feature-rich Twitter/Mastodon/Fanfou app for Android 4.1+. Enjoy Fediverse now. -
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*YouTube Extended: v20.45.36 *Music Extended: v8.44.54 *YouTube Extended-BETA: v21.13.163 *Music Extended-BETA: v9.12.51 *ReVanced YouTube: v20.40.45 *ReVanced Music: v8.40.54 *ReVanced MicroG: v0.3.13.2.250932 *ReVanced Reddit (Extended-Extras): v2026.04.0 *ReVanced Reddit-BETA (Extended-Extras): v2026.12.0 *ReVanced X (Extended-Extras): v11.77.0-release-0 *Extended Morphe Patches: cli_v1.6.3-patches_v1.22.2 *ReVanced Patches: cli_v6.0.0-patches_v6.1.0 *X Extended Patches: cli_v1.6.3-patches_piko-v3.1.0 Thank you! ReVanced Team!
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WAN-Transfer — Easy WebDAV File Share
Share local folders online via WebDAV with UI and instant tunneling
WAN-Transfer is a lightweight WebDAV server with a simple UI that makes it easy to share folders from your PC across your local network — or over the internet using built-in tunnel services. With no setup required, you can expose any local directory via a public WebDAV link and mount it directly in Windows Explorer or any WebDAV client. Choose your tunnel provider (LocalTunnel, Serveo, localhost.run, Cloudflared) and instantly make your server accessible from anywhere — no port forwarding or firewall tweaks needed. The clean interface makes it effortless to configure ports, select directories, and copy access links. Whether you're sharing files with others, setting up remote access, or just testing ideas, WAN-Transfer makes it easy to serve content directly from your machine. Built with modularity in mind, WAN-Transfer is designed to support additional tunnel services and sharing options in future updates. -
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Android components
A collection of Android libraries to build browsers
A collection of Android libraries to build browsers or browser-like applications. A fully-featured reference browser implementation based on the components can be found in the reference-browser repository. We encourage you to participate in this open source project. We love pull requests, bug reports, ideas, (security) code reviews or any kind of positive contribution. -
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Foodium
Foodium is a sample food blog Android application
Foodium is a sample food blog Android application built to demonstrate the use of Modern Android development tools. Dedicated to all Android Developers. It simply loads Posts data from API and stores it in persistence storage (i.e. SQLite Database). Posts will be always loaded from local database. Remote data (from API) and Local data is always synchronized.
