Linux isn't quite like Windows or Mac, as there are many, many distributions, usually running on one of two desktop systems (GNOME or KDE). We've chosen to write this list up from the perspective of a standard, GNOME-based Ubuntu user. Ubuntu is what the Lifehacker editors use, it's what most of our Linux-leaning readers use, and it's generally popular and frequently updated. Many of these apps can be downloaded and installed on other Linux systems, of course—check the Download link, or search out its name in your own system's package installer.
If you are using Ubuntu, you can also install these apps by clicking the "Install in Ubuntu" link after each item. It's a link that prompts your own Ubuntu system to search out and install an app from its own repositories—with your permission, of course. You may be asked on your first install to allow your browser to open up an Ubuntu app to handle the link, but go ahead and agree with it, and you'll be installing apps with one click after that. We've also placed aggregated installer links at the bottom of each section, and a mega-installer at the bottom of the post, so you can install multiple apps at once.
Note: If the packages don't appear to be installing on your system, and you're running Firefox, you may need to install a support package for Firefox 3.6 Do that by opening a terminal and entering the command
sudo apt-get install apturl firefox-3.6-gnome-support.
Some other apps (Chrome and Dropbox) require a download, some are pre-installed in Ubuntu, and others may require the enabling of an extra repository or two for certain third-party apps, but we've explained how to do so in a previous Ubuntu feature (short version: open "Software Sources" from the System/Administration menu).All here: Lifehacker Pack for Linux: Our List of the Best Linux Downloads