https://joeyh.name/code/moreutils/
A few examples that I think are interesting (in no particular order):
- vipe: lets you edit text manually within a pipeline (uses $EDITOR)
- sponge: “soaks up” input from stdin and writes it to a file or stdout only after the input stops
- pee: splits output between pipes
- vidir: lets you use an editor to edit directories (uses $EDITOR)
- zrun: automatically uncompresses files passed to a command