"A simple dmenu-based file manager," authored by Wintervenom on the Arch User Repository. You can find it in the AUR here.
This is just a fork of it with a fix/tweak or two.
Info from AUR as of 03/18/13
Description: A simple dmenu-based file manager.
Upstream URL: http://wintervenom.mine.nu [non-working link as of 03/18/13]
First Submitted: 2009-03-03 10:11
Last Updated: 2009-03-03 21:37