WordPress plugin: the_time_modified
This is a really simple WordPress plugin that works in exactly the same way as the_time except that, rather than returning the time a post was published, it returns the last time it was modified. In every other respect it’s exactly the same as the_time.
To use it, simply enter the function within the WordPress loop like so:
the_time_modified();
Of course, you can enter arguements within in the parentheses. All the options are exactly the same as for the_time.
You can download it here.