Gloobus Preview is a beautiful file preview application for Linux. Select a file and click space bar to have a quick preview of the file, as simple as that.

By using a Nice utility Gloobus you can view almost all file type. Gloobus is a free application for GNU / Linux . Gloobus-Preview is an extension for the Gnome Desktop designed to enable a full screen preview of any kind of file.

One of the greatest mysteries to me is why most file managers don’t have tabs - it makes performing tasks so much simpler.
I’ve found a lightweight file manager for Ubuntu called PCMan that gives you most of the functionality from Nautilus, but also has tabs.

By using a Nice utility Gloobus you can view almost all file type. Gloobus is a free application for GNU / Linux . Gloobus-Preview is an extension for the Gnome Desktop

There may well be some of you out there who are currently thinking, “It’s not that bad…” to which my response is: in terms of user interface, there are much better file managers available for GNOME than GNOME’s default file manager (two, off the top of my head: Thunar, default for the Xfce Desktop Environment and PCMan File Manager, or PCManFM).

An overview of 10 most popular file managers for Linux, including Nautilus, Thunar, PCManFM, Dolphin, Midnight Commander and Xfe.

9 Linux file managers: Konqueror, Nautilus, Krusader, Dolphin, Xfe, PCManFM, Thunar, ROX-Filer, Midnight Commander.

The Gloobus devs have been working on a Gloobus Flow integration with Nautilus with looks amazing! This tutorial will explain how to install it in Ubuntu (Clutter, Gloobus Flow and a patched Nautilus).

Nautilus is the default file manager used in Gnome by most of the Linux distributions, now even though nautilus is extremely user friendly and has wide array of features (including ability to extend it's feature set with scripts and extensions). All these features does make nautilus bit resource hungry especially if you are using older machine.