I love fzf as well. I use it with the npm package manager to select the script to run (we have an app with 20+ scripts):

    npmrf () {
        local script
        script=$(cat package.json | jq -r '.scripts | keys[] ' | sort | fzf)  && npm run $script
    }

Another usecase is tracking hours with Clockify. I was frustrated opening up the web everytime, so I wrote a script using fzf, httpie and jq. Love it now. [1]

[1]: https://marcel.is/tracking-hours/