Omni completion isn't automatically turned on for Vim 7, and it's super useful if you code in CSS or HTML. In your vimrc you can add following to turn completion on: autocmd FileType python set omnifunc=pythoncomplete#Complete autocmd FileType javascript set omnifunc=javascriptcomplete#CompleteJS autocmd FileType html set omnifunc=htmlcomplete#CompleteTags autocmd FileType css set omnifunc=csscom