Filegator

Pretty fancy and modern terminal file manager

Xplorer, a customizable, modern file manager

kodbox is a file manager for web. It is a newly designed product based on kodexplorer.

A Beautiful File Manager

A modern file manager that helps users organize their files and folders.

"Sigma File Manager" is a free, open-source, quickly evolving, modern file manager (explorer / browser) app for Windows and Linux.