Total Commander is a Windows based file management program with the good plugin system.

Koofr offers safe EU based cloud storage with 2 GB free cloud storage space for life and options to connect multiple cloud accounts.

CloudBuckit is a desktop application that connects all of your cloud storages and FTP servers in one place.

Unifyle connects Oracle Documents Cloud to all the different file storage silos including File shares, Sharepoint, FTP, BOX, Dropbox, Office365, Sharefile etc…

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

aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink, etc.

Storage Made Easy provides a hybrid Cloud File Server Enterprise File Share and Sync Solution.

FastMail is an email service offering paid email accounts for individuals and organizations.

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

FolderSync enables simple sync to cloud based storage to and from local folders on the device SD cards.