Alfred is my go-to application launcher. It goes well beyond launching applications, particularly if you have the Alfred PowerPack.
Below are four of my most used Alfred Workflows. All are free, with the ability to install each automatically within the application:
Unit Converter
Quickly convert units (inches to km, degrees to radians, etc.) from Alfred. Use the keyword conv followed by a number, and Alfred shows you a list of common conversions.
Currency Converter
Ever want to know what $15.72US converts to in English pounds? Currency Converter makes currency conversions like this one instantaneously.
Coffee Coffee
There’s no real need for a dedicated “keep Mac awake” app with Coffee Coffee. Type coffee to keep your Mac awake indefinitely. Type coffee 15 and your Mac will stay awake for 15 minutes, and so on. Super useful.
About Mac
This Workflow displays your Mac’s specs right from within Alfred. With it, I no longer need to visit System Settings. Quickly identify macOS version number, memory, storage, resolution, uptime and more by simply typing about within Alfred’s text field.
-Krishna