The autoload directory is for standard Vim autoload scripts. These are functions used by plugins and for general use. They will be loaded automatically when the function is invoked. See ":help autoload". gzip.vim for editing compressed files netrw*.vim browsing (remote) directories and editing remote files tar.vim browsing tar files zip.vim browsing zip files paste.vim common code for mswin.vim, menu.vim and macmap.vim spellfile.vim downloading of a missing spell file Omni completion files: ccomplete.vim C csscomplete.vim HTML / CSS htmlcomplete.vim HTML javascriptcomplete.vim Javascript phpcomplete.vim PHP pythoncomplete.vim Python rubycomplete.vim Ruby syntaxcomplete.vim from syntax highlighting xmlcomplete.vim XML (uses files in the xml directory)