These are tools which have a wide variety of uses! Taxiing ingredients, handling bread, scraping bowls, pushing stuff through a tamis, cleaning boards etc. There does seem to be a wide variety of materials and shapes they're made out of, and consequently some of them are better at certain things than others are. They're typically inexpensive though, so you can probably afford a few.
What are some of your favourites for specific tasks, or just in general?