command-not-found.com
Displays a summary of historical uptime records. More information: <https://manned.org/uprecords>.
The original Unix text editor. See also: awk, sed. More information: <https://www.gnu.org/software/ed/manual/ed_manual.html>.
An ssh password provider. It works by creating a TTY, feeding the password into it, and then redirecting stdin to the ssh session. More information: <https://manned.org/sshpass>.
User addition utility. More information: <https://manpages.debian.org/latest/adduser/adduser.html>.
Terminal session manager. More information: <http://www.brain-dump.org/projects/abduco/>.
Tool to interactively inspect HTTP requests and responses. More information: <https://github.com/asciimoo/wuzz>.
Reverse a line of text. More information: <https://manned.org/rev>.
Java heap analysis tool. More information: <https://docs.oracle.com/javase/8/docs/technotes/tools/unix/jhat.html>.