vim-lsp
async language server protocol plugin for vim and neovim
...With a server configured, you get go-to-definition, hover docs, signature help, references, rename, code actions, and diagnostics. It is designed to be minimal and extensible, often paired with completion plugins like asyncomplete or others for a full experience. Works with many language servers via simple server configuration blocks. The project aims to stay close to the LSP spec while exposing familiar Vim commands and mappings. It allows per-project or per-filetype setups, so multiple languages can be enabled side by side.