RaiDrive is a cloud file manager that supports Google Drive, Box, etc

Cryptomator is a multi-platform transparent client-side encryption of your files in the cloud.

Air Explorer is a software to manage all your multiple cloud drives (like Dropbox, Onedrive, Google Drive, Mega, Mediafire, Box, Hidrive, Yandex, Baidu, etc.

File Expert is an advanced file explore on Android. It manages files, photos, music, videos, docs and APKs efficiently on both local and Clouds.

PDF Studio is a multi-platform PDF editor.

odrive is a Universal sync client to unify, sync, share, and encrypt all your files in Amazon Cloud Drive, Dropbox, Google Drive, OneDrive, Box, S3, WebDAV, F…

CloudMounter is a reliable system utility that allows mounting different cloud storages and web servers to your Mac as local disks.

Boxcryptor protects your data in the cloud with end-to-end encryption.