Which source packages contain the source code of the indicated applets?
If the answer is a catch all source package like "gnome-applets", what is name and location of the individual applets within the source package?
Note: I am using 12.04.
Most of the applets is provided by the packages
The exception is applet 2.
This is the Menu Bar (custom menu) - the code is in the folder
Source files: window-menu*
This is provided by the package
This is the window list - the code is in the folder
Source files: window-list*
This is the workspace switcher - the code is in the folder
Source files: workspace-switcher*
These are most likely in the 'gnome-panel' package. #2 could also be a combination of 'indicator-applet' (or its clones, 'indicator-applet-*') and 'indicator-session'.