This is similar to selecta[0] and peco[1] except it can be used in places those can't because it uses a GUI, so you could use it in program, even if the program doesn't directly let you use its stdin or even have any other UI.
I'm going to see if I can make it work with vim, although my VimL is really awful.
[0]: https://github.com/garybernhardt/selecta
[1]: https://github.com/peco/peco