ReactOS Explorer is the default graphical shell that comes with ReactOS. It's meant to be an analog of Windows Explorer. It's made and maintained by Martin Fuchs.
The page ReactOS Explorer is a short article on something that should have a lot more information written on it.
If you know anything else about it, you are STRONGLY encouraged to add the information in. If you are unsure of proper formatting or style, add it to the talk page or this page itself as you think best and others will help.