vidir

Edit a directory in your text editor.

https://github.com/DamienRobert/vidir2/blob/master/vidir2

There's actually a fork that lets you edit symlinks too!

chronic

Runs a command quietly unless it fails.

A common use for chronic is for running a cron job. Rather than trying to keep the command quiet, and having to deal with mails containing accidental output when it succeeds, and not verbose enough output when it fails, you can just run it verbosely always, and use chronic to hide the successful output.

0    1 * * * chronic backup # instead of backup >/dev/null 2>&1
*/20 * * * * chronic -ve my_script # verbose for debugging

mooarr

combine:  combine the lines in two files using boolean operations
errno:    look up errno names and descriptions
ifdata:   get network interface info without parsing ifconfig output
ifne:     run a program if the standard input is not empty
isutf8:   check if a file or standard input is utf-8
lckdo:    execute a program with a lock held
mispipe:  pipe two commands, returning the exit status of the first
parallel: run multiple jobs at once
pee:      tee standard input to pipes
sponge:   soak up standard input and write to a file
ts:       timestamp standard input
vipe:     insert a text editor into a pipe
zrun:     automatically uncompress arguments to command