I always see interesting stuff when updating Homebrew, much of which I have no idea what it is:
$ brew update
==> Updated Formulae
==> allure frugal jenkins-lts paket
==> bro geth jvgrep plank
==> chronograf iperf3 mariadb suricata
==> ffmpeg@2.8 jenkins mpv
$ brew info bro
==> bro: stable 2.5.3 (bottled), HEAD
==> Network security monitor
$ brew info suricata
suricata: stable 4.0.4 (bottled)
Network IDS, IPS, and security monitoring engine
Whoa, by sheer chance I picked two that were network security monitors.