filestash.app
Filestash, formerly Nuage, is a self-hosted web client for data storage. It connects to backends including S3, SFTP, FTP, WebDAV, SMB, NFS, Dropbox, Google Drive and Git repositories. The project describes itself as an open source platform for file sharing, document management, MFT and archiving, with a unified API and gateways that expose data over protocols such as SFTP, S3, WebDAV, FTP and MCP.