vim-racer

Does vim-racer[0] not work for you? I don't exactly know what you mean by "good autocomplete", but if you are more specific, then maybe we can help you a little more? :-) FWIW, my Rust setup in vim is mostly the following plugins: * NERDCommenter, for commenting stuff * rust.vim, for general rust things (like integration with rustfmt, playground, and the next two plugins) * tagbar, for showing the list of tags (of the ctags-esque sense) in a sidebar. * syntastic, for on-the-go syntax checking. [0]: https://github.com/racer-rust/vim-racer

Vim's autocomplete is alright, but it can definitely be super-charged by plugins like vim-autocomplpop[0], superTab, and language specific plugins like vim-racer[1]. Vim-autocomplpop is a fairly old plugin, but it still works just fine. It automatically shows autocompletion options as you type like an IDE. This is very handy. The only downside is that external autocompletion engines like ctags and rope can sometimes cause performance issues. For example, python.vim uses rope to analyze a file, but that can take a while to initialize and crawl directories if you're editing a file in your home directory. Since it's a plugin written before Vim/Neovim's async code, it tends to make Vim unresponsive, so I only enable vim-autocomplpop on projects I'm working on. This isn't an issue if you use Vim's built-in autocomplete (instead of python.vim).