Bsdextrautils
- col(1) filter reverse line feeds from input
- colcrt(1) filter nroff output for CRT previewing
- colrm(1) remove columns from a file
- column(1) columnate lists
- hd(1) display file contents in hexadecimal, decimal, octal, or ascii
- hexdump(1) display file contents in hexadecimal, decimal, octal, or ascii
- look(1) display lines beginning with a given string
- write(1) send a message to another user