google-drive

CarotDAV is a Simple WebDAV / FTP / SkyDrive / DropBox / GoogleDrive / Box / SugarSync client for Windows OS, available free of charge. It is also able to read GoogleDocs or IMAP.

Cryptomator provides transparent, client-side encryption for your cloud. Protect your documents from unauthorized access. Cryptomator is free and open source software, so you can rest assured there are no backdoors.

Map or Mount Amazon Drive, Google Drive, Dropbox, Box, OneDrive, SFTP, WebDAV, S3 and more as a Network Drive. Seamless access to files without sync.

Open-source software for syncing and backing up files across Windows, macOS, and Linux by transferring only essential data.

Iperius Backup is a robust, flexible and lightweight solution to backup and protect your files and your reserved data. Windows 8 and Server 2012 compatible, backup to DAT and LTO tape, backup to NAS and RDX drives, external USB drives, zip compression, AES 256 bit encryption...

MiXplorer (Mix of Explorers) is a fast, smooth, beautiful, reliable and fully-featured file manager with a simple and intuitive user interface.

Centralize management of numerous cloud accounts in a single platform, transfer data directly between services such as Dropbox, OneDrive, Google Drive, and FTP, automate transfers with scheduling, organize files using unified login, and track transfer history securely.

Remote storage tool that lets you access your cloud files as if they're on a local disk.

Unify all your storage. odrive makes it easy to access, sync, and share all your files from one place. Integrations to 20+ services, desktop sync, CLI (inc. Linux), placeholders, zero-knowledge-encryption, web client, advanced sharing, and more.

Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.

Mount NAS, Router, Google Drive, OneDrive and Dropbox to a network drive on File Explorer. No need for synchronization and no need for web browsers!.

File manager / explorer with full access to files on SD card, external SD card, cloud services, SMB, FTP, WebDAV, HTTP, NAS, USB OTG and system internal flash if working on a rooted phone.