The standard 'man' documentation suite.
'man' is the man pager.
'man2html' is an utility that converts man pages to html
'hman' is a man browser that uses your favorite browser. For use with lynx, no http daemon is required.
'whatis', 'makewhatis', 'apropos', 'man2dvi' are of course also part of the suite.
These details are provided for information only. No information here is legal advice and should not be used as such.