TablePlus, the database management tool.
It has a simple but great UI, and it's really fast because it's a native app. Honestly, most of the other apps I use often (like VS Code, Slack) are made using Electron.
@chnsydney Hey Sydney : )) Nice one! The prob for me with these touch bar customization apps is that it removes the basic keys (brightness, volume, play, etc.)... I'd have rather appreciated that Apple added a touch bar in addition to the classic keys