LaunchBar
LaunchBar is a small Windows freeware program that mimics the behavior of the dockable QuickLaunch toolbar that was available in all Windows versions before Windows 7.
Program homepage is at: http://www.lerup.com/LaunchBar
The source code is distributed under the GPL version 3 license, see the file LICENSE.txt for full information about this.
The source is in C++ and the intended build environment is Visual Studio 2013.