This is an extremely fast file manager featuring lightweight and
tabbed browsing. It's simple, fast, easy-to-use, standards-compliant, resource-careful, and fits the "minimal requirements" to be a file manager.

The interface looks clean and nice, here are some screenshots:
http://pcmanfm.sourceforge.net/screenshots.html

Shortcut keys and interface design are compatible with Firefox, which are familiar to most of the people.

Quite different from nautilus, which is absolutely great, our goal is not to make such a powerful file manager, but a "good enough" one, and keep it as simple as possible. Nautilus is undoubtedly one of the best file managers, but it's too heavy, and doesn't suitable for older machines, or some more
restricted environments. So, PCMan File Manager can be a "lightweight" replacement for those who don't need that much functionality, but need speed and low memory usage while preserving most of the essential parts at the same time. PCManFM is not simplified from nautilus, but totally written from scratch.