What it is: Shazam is an app that can identify most songs just by listening to them for several seconds. The widget is a quick way to tag songs you’ve never heard before directly from the home screen. (SoundHound, a similar app, doesn’t have a widget in its free version, but does offer a Shortcut for free that jumps directly to the app’s tagging function.)
Why it’s a good widget: Back in my iPhone-owning days, I’d always fumble through my app list looking for Shazam as a song I wanted the name of played on in the background. Half the time, I’d find the app too late, and the song would end. Never again as an Android user. [Free, Link]