Docs: http://www.twentypede.com/leg4
Compare folder contents:
jeeva --overlap/--mtime/--diff folder1 folder2
--overlap (see files that are in one or other folder, or common to both.)
--mtime (files that are newer, the same age, or older )
--diff (files whose content is identical or different)
Optionally can recursively descend to a specified depth or completely down folder tree comparing corresponding folders while descending.
--copy
for mirroring folders...