Package “txt2man” has 3 man pages.

bookman compiles a set of man pages files specified by manfile arguments, or if no manfile is given, filenames are read from standard input.
src2man scans source file srcfile. Only C source files are supported for now. Comments blocks starting by "/** num", where num is a section number, are...
txt2man converts the input text into nroff/troff standard man(7) macros used to format Unix manual pages. Nice pages can be generated specially for commands...