Open Source C# Cloud Storage Software

Duplicati is a free and open source backup client for securely storing your data. Duplicati stores encrypted, incremental, compressed backups on cloud storage services and remote file servers using AES-256 encryption, keeping your data safe and always updated. It works with most storage services, including Google Cloud and Drive, Amazon S3, Microsoft Azure and OneDrive, Dropbox, FTPOpenStack Storage (Swift), SSH (SFTP), WebDAV, Tencent Cloud Object Storage (COS), and more! Duplicati also works on all major platforms (Windows, Linux and OSX). Unlike many other backup solutions, Duplicati ensures that your data is stored securely far away and updated regularly. Incremental updates means it saves on bandwidth and storage space, with a scheduler that automatically keeps your backups up to date.

Proton Drive for Windows is Proton’s official Windows desktop client repository, implemented as a native Windows application with a C# codebase and supporting assets, installer tooling, and solution-level project organization. The repository is positioned primarily as source transparency for the official app distributed through Proton, with distribution guidance pointing users to download stable releases from Proton’s official channels rather than relying on GitHub releases. Its licensing model reflects a mixed approach where the overall project is governed by GPL terms while certain portions are explicitly licensed under MIT, which is common in desktop apps that incorporate reusable libraries or shared components. The project layout suggests a complete desktop application lifecycle, including installer-related directories and structured source organization suitable for enterprise-grade maintenance.

Have a lot of folders you want to sync to OneDrive but not enough space in your main hard drive? I did, I had all my photos on the D:\ drive but OneDrive was requiring to copy them to the OneDrive folder in C:\ . But my C:\ is not big enough. OneDrive Bully was developed to solve exactly that. It uses Windows Symbolic Links to link your folders sitting outside your OneDrive folder in any hard drive or network path. OneDrive doesn't support it currently. OneDrive Bully solves the issue by triggering OneDrive to sync, including these folders on a timer you set. The best thing is it is doing it without affecting the standard OneDrive application or requiring you to login to another OneDrive client. You can also double click the icon and force sync whenever you want. Saved the best for last, OneDrive is Free! Bully your OneDrive! Track OneDrive Bully news and updates also on Facebook: https://www.facebook.com/OneDriveBully

A federated search application for discovering interesting files that are being shared online, such as video, music, books, software, games, subtitles and much more. All data is crawled by od-database which collects information about the contents of servers worldwide. We don't search file contents. We host no content, we provide only access to already available files in the same way Google and other search engines do.

The aim of this project was to build a desktop app to quickly upload files, and switch between users in a swift

SyncStuff is a personal cloud that relies on rsync to sync your files of your desktop, laptop, PC at work to and from a home server.

dboxShare is an easy-to-use free open-source enterprise file hosting server software, based on .NET technology development, used to build a safe and efficient file cloud storage and cloud management platform. Users don't need to change their work habits, and two-way file synchronization will automatically upload, download and update versions according to their permissions, providing a convenient and efficient solution for sharing and cooperation. The system has the characteristics of simple installation, flexible deployment and small maintenance. It is suitable for enterprises, organizations and teams to build a safe and efficient private cloud drive. Installation guide Please refer to http://www.dboxshare.com/en/install.html