They don't exist as far as I know.
You can generate a listing, but that doesn't show per library the ram usage.
And the Arduino compiler/linker is able to remove unused parts, so it can be hard to tell what the resulting usage will be.
I read once that it would be possible in the future to add custom compiler flags. I don't know if that is implemented yet. The avr-gcc compiler can do a lot of optimizing tricks that are not yet used by the Arduino. Long time ago I tried a few optimizing flags and the result are astonishing.
As far as I know, the Arduino uses an older version of the avr-gcc, since the newer version was changed too much and no longer compatible with the Arduino IDE.
Perhaps you could replace a library with a smaller version. If you can determine the most memory-hungry library.