SpaceFM is a new file manager, not mature enough but quite powerfull, even i replace pcmanfm with this.

take a look :

very similiar to pcmanfm right? but this is the difference, pcmanfm now using gvfs, with advantages trash & network device support but also boost the memory usage because it’s mean you need gvfs packages, this application also work like old pcmanfm version 0.5.x which using “hal” even manay distro abandoned it, but hal is very powerfull stable and fast also, little memories usage, but doesn’t give you trash or network storage support like samba, ssh, etc.

If you need the lightweight one this is may be can satisfiy you 🙂

AUR : http://aur.archlinux.org/packages.php?ID=55777
Packages : http://downloads.sourceforge.net/project/spacefm/spacefm-0.6.2.tar.xz