I'll throw in another:

For a cool "hacker" (and more powerful in many ways) alternative to spotlight, install iTerm2, and activate a drop down quake style hotkey window. [1]

Then install broot, which is a fantastic command line search tool. [2]

[1] https://www.iterm2.com/documentation-hotkey.html

[2] https://github.com/Canop/broot