By Unknown

Change elementary's Theme

Although elementaryOS is an internally consistent theme, the team hasn't concerned itself to create icons which make non-native apps appear native. To bridge the gap between looks and consistency, you may wish to tweak you elementary theme. The easiest way? Ubuntu Tweak.
Before we hear from the distractors, let's address some concerns. (1) No, it's not a native app. It looks horrible on an elementaryOS system. (2) Yes, there might be plans for a Pantheon Tweak. But it looks like this project may be a ways out.

So what is Ubuntu Tweak? And why should we care about it?

Primarily, it's an easy way to change your elementaryOS theme. Simply by selecting from your installed themes in the drop-down menus, you can alter the entire look and feel of your system.
It's also an easy way to install every-day applications which don't come standard with elementary: Google Chrome, WINE, Skype, and some popular development kits.
To install, in the terminal paste in the following:
sudo add-apt-repository ppa:tualatrix/ppa
sudo apt-get update
sudo apt-get install ubuntu-tweak
It's not an ideal fix, but it bridges the gap while elementaryOS is still in beta mode.