Name few productivity-booster tools that you use as a DEV

As the title says, lets mutually help each other to find some interesting gem's of tools to boost our productivity.

Other than the default ones like Visual Studio/Code, Postman, GitHub Desktop, I also love using LinqPad and DevToys (https://github.com/DevToys-app/DevToys), also I use Obisidian for quick notes.