Sound input/output selector indicator for Ubuntu/Unity.
I created this app because there was just no sound switcher indicator available.
It shows an icon in the indicator area in Ubuntu's Panel. Icon's menu allows you to switch the current sound input and output (i.e. source and sink in PulseAudio's terms, respectively) ports with just two clicks:

Interested? Read how to install the indicator.
If you want to install the indicator, refer to the installation section. Here you can download the latest source code of the application.
Sound Switcher Indicator 2.1.1
A simple sound input/output switcher indicator application for Ubuntu 14.10+. Source code in .tar.gz archive.
87.515 KiB - Released on Nov 1, 2016 - 1,196 downloads
Sound Switcher Indicator 1.2.2 (GTK+2)
A simple sound input/output switcher indicator application for Ubuntu 12.04…13.04. This is the last available version for these systems. Source code in .tar.gz archive.
82.949 KiB - Released on Feb 18, 2014 - 362 downloads
To download the latest source code, clone my GitHub repository:
git clone https://github.com/yktoo/indicator-sound-switcher.git
To download the source tarball, check the Launchpad PPA packages page.
This software is distributed on the terms of GNU General Public License Version 3 or (optionally) any later version.
Software and any related documentation are provided on an as is basis, without warranty of any kind. The entire risk arising out of use or performance of the software remains with you.
The source code is available in my GitHub repository.