There is a marlin fork:
sudo add-apt-repository ppa:elementary-os/daily
sudo apt-get update
sudo apt-get install pantheon-files
Related:
Update 3: The instructions below are outdated, and Marlin may no longer be maintained? Thank you @kipbits for bringing this to my attention!
Update: So for gnome 3.
Perhaps Marlin
sudo add-apt-repository ppa:marlin-devs/marlin-daily
sudo apt-get update
sudo apt-get install marlin
sudo apt-get install marlin-plugin-*
What you are looking for is a Columns View capable window/file manager as seen (here). Nautilus is still discussing whether to include Miller Columns.
For gnome2/nautilus themes:
Install and configure a new theme. (like this) Download (mac4lin)