Open Source Mobile Operating Systems Cloud Storage Software

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.

A fully-featured client to access your Cloud Storage provided by MEGA.

Proton Drive SDK is Proton’s dedicated SDK repository intended to provide reusable client libraries for integrating Proton Drive capabilities into other applications, with an initial focus on a JavaScript SDK and plans for a C# SDK. The repository is explicitly labeled as a work in progress and notes that it is not ready for use yet, which signals that public APIs and stability guarantees should not be assumed at this stage. Its implementation is predominantly TypeScript, which is well-suited for producing strongly typed JavaScript libraries that can be consumed across modern web and Node.js environments. By centralizing shared SDK logic in a single repo, Proton can standardize how third-party or internal clients interact with Proton Drive’s protocols and behaviors, reducing duplication and improving consistency across platforms over time.

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An experimental cloud storage service built with Next.js, featuring client-side file encryption, a dedicated password vault, advanced integrity verification functionality, and a convenient UI. Lakhash is also equipped with the password vault. Check it out at https://lakhash.netlify.app GitHub repository: https://github.com/Northstrix/Lakhash Codeberg repository: https://codeberg.org/Northstrix/Lakhash/ The related Medium article can be found at https://medium.com/@Northstrix/2be1c60ec6e8

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Nextcloud Android app is the Android client for Nextcloud, a private file sync & share and communication server. It lets you access all of your files easily on your Nextcloud from any Android device. Nextcloud Android app is easy to use and completely open source, so you can host it yourself or have a company do it for you. Always stay in control of your photos, calendar, contact data and other documents and files with Nextcloud.

An open-source file sharing app built using Next.js and Perplexity. The app employs ML-KEM-1024, ChaCha20, Serpent-256, and HMAC-SHA512 to ensure data confidentiality and integrity. The app is also equipped with a dedicated password vault. Check it out at https://plum-harbor.netlify.app/ GitHub page: https://github.com/Northstrix/plum-harbor Codeberg page: https://codeberg.org/Northstrix/plum-harbor The app is available in English and Hebrew. German version is available here: SourceForge: https://sourceforge.net/p/plum-harbor-deutsch GitHub: https://github.com/Northstrix/plum-harbor-deutsch Codeberg: https://codeberg.org/Northstrix/plum-harbor-deutsch Deployed app: https://plum-harbor-deutsch.netlify.app/

Proton Drive for iOS is the official iPhone and iPad client repository for Proton’s end-to-end encrypted cloud storage service, intended to securely back up and share files within the Proton ecosystem. The project is built around Apple’s native toolchain and is designed to be opened as an Xcode workspace, reflecting a production-grade iOS app structure with standard signing and provisioning requirements. It includes a stated trust model section, reinforcing that the client is meant to be scrutinized and understood as part of a privacy-first architecture rather than treated as a black box. Dependency management is handled through Swift Package Manager, keeping builds consistent and minimizing external tooling complexity for contributors and auditors. While it is open source and positioned for public review, the repository explicitly indicates that contributions are not accepted at the moment, which signals a controlled development and release pipeline.

iCloudDocumentSync is a library that simplifies document synchronization between iOS and macOS using iCloud. It enables seamless file storage, retrieval, and versioning across Apple devices.