Raycast is extremely useful. It's described as "a blazingly fast, totally extendable launcher.
It lets you complete tasks, calculate, share common links, and much more."
Well yeah, it can do all these things and it just sits in your menu bar waiting to do so at the click of a quick keystroke of your choosing.
The ability to save and access multiple things from my clipboard alone has made this a worthwhile install. (Cheers to Tommy P for recommending :)
Raycast appeared in Issue 9 in the Useful section.