Whilst eclipse tells me about unreferenced variables, classes and imports, it doesn’t tell me if there are values in the resource files that are not used.
Being able to remove everything that is not used would be very useful from a translation point of view.
Is there a tool out there that can do this?
Option 1:
NOTE: Does not work for resources referenced directly in xml and ids loaded through reflection.
Considering that generated ids of all resources are located inside your R.java file this should be possible using the Eclipse Core Tools.
The menu option looks like this:

Option 2:
http://code.google.com/p/android-unused-resources/