vim/runtime/autoload

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

Occult completion files:
ccomplete.vim		C
csscomplete.vim		HTML / CSS
htmlcomplete.vim	HTML