Anyone who hasn't seen suckless.org (where dmenu comes from) should look through what's on there. It has some really small and often useful tools.
I do agree on the tiling WM bit :(.
vis-menu is distributed with vis: https://github.com/martanne/vis
This project seems fine as well; though the examples seemed a bit complicated to me. I guess I'll need to rtfm.
System Preferences > Spotlight > Search Results