callgrind_annotate (1) - post-processing tool for the Callgrind
cg_annotate (1)      - post-processing tool for Cachegrind
compare (1)          - mathematically and visually annotate the difference be...
git-annotate (1)     - Annotate file lines with commit information
gpgparsemail (1)     - Parse a mail message into an annotated format
opannotate (1)       - produce source or assembly annotated with profile data