I never really used a tool like it when I was on Windows or Linux but I find Alfred really useful, where I can press Alt + Space that brings up a simple dialog

I never really used a tool like it when I was on Windows or Linux but I find Alfred really useful, where I can press Alt + Space that brings up a simple dialog where I can type: app name find filename open filename Just typing an app name will allow you to open it on pressing enter. Find will reveal the file or folder in Finder. Open will open the file. If it doesn't recognise a name or command, it'll default to giving options to search in Google and other search engines. Another really useful feature is typing an arithmetic expression and it being calculated for, which can then be copied to keyboard by pressing enter. I use this feature a lot. I think there are a lot of other things I could learn about Alfred myself but it's probably my most used tool! There's also a premium version with more features but I haven't looked into it much. I know there's Quicksilver and spotlight but Alfred is much quicker and smoother for me.