Marlin File Manager is now available for Ubuntu 14.04/14.10/Linux Mint

Marlin is a lightweight file browser built from the ground-up to be responsive, simply designed and easy to use. Marlin is based on gtk3 and uses Gnome 3 technologies extensively and is built in C and uses vala for interface. Some key features of XFCE file-browser Thunar too are included to give it a certain slickness despite it being a File browser.
Marlin uses 'extended actions' to manage files. This service allows applications to request some extended actions for a list of files depending on their mimetypes and some other constraints. Any user can extend their applications by adding custom actions.

Marlin Features:

• Tabbed browsing
• Multiple-views
• Single-click to open (default)
• Configurable toolbars and interface
• Plugin framework
• networking support (SSH, FTP, Windows share, HTTP and HTTPS)
• single click/double click to open file
• And Many More

>>>Available for Ubuntu 14.04 Trusty/14.10 Utopic/Linux Mint 17
To install Marlin File Manager in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:

Terminal Commands:
sudo add-apt-repository ppa:noobslab/apps
sudo apt-get update
sudo apt-get install marlin

>>>Available for Ubuntu 12.04 Precise/Linux Mint 13
To install Marlin File Manager in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the terminal:

Terminal Commands:
sudo add-apt-repository ppa:marlin-devs/marlin-daily
sudo apt-get update
sudo apt-get install marlin

That's it

Source: launchpad