I was inspired by NigelTufnel's comment where they mentioned the app 'Magnets'
I've had a few apps that drastically improved my workflow & I'm always looking for more.
Of course (free) AdBlock extension for a browser is a no-brainer, but one (paid) app 'Paste' (for MacOS, OSX) has been a game changer for me - it allows me to instantly (CMD+SHIFT+V) access my paste history; I can now copy several items at once and easily access them later/connect this history across devices. The UI is very snappy and intuitive.
I was curious - what other apps have been 'game changers' for you? Are they free? Worth the money?
A free option to increase productivity, but a very tough one is not to check “social media” through out the core part of your day.