skim (fuzzy finder) is described as 'Fuzzy Finder in rust! It is blazingly fast as it reads the data source asynchronously. It can invoke commands while searching and has a preview window' and is an app. There are eight alternatives to skim (fuzzy finder) for Mac, Linux, Windows, Vim and BSD. The best alternative is fzf, which is both free and Open Source. Other great apps like skim (fuzzy finder) are fzy, pick (fuzzy search), pmenu and icepick.