Misses two of my favourite things:
systat gives a curses updating view of a bunch of things. For example systat -ifstat 1 updates once per second and shows network load.
systat -ifstat 1
^T in any tool sends SIGINFO. Most tools that have long-running behaviour will print what they’re doing. For example, tar or cp will show what they’re copying and how far they are. I don’t know how people use the Linux command-line without this.
Some other commands only available on FreeBSD are: