return {
  {
    'hrsh7th/nvim-cmp',
    dependencies = {
      'nvim-lua/popup.nvim',
      'nvim-lua/plenary.nvim',
      'saadparwaiz1/cmp_luasnip',
      "hrsh7th/cmp-emoji",
      'hrsh7th/cmp-nvim-lsp',
      'hrsh7th/cmp-buffer',
      'hrsh7th/cmp-path',
      'hrsh7th/vim-vsnip',
      'octaltree/cmp-look',
      'folke/trouble.nvim',
      {
        'L3MON4D3/LuaSnip',
        config = function()
          vim.keymap.set(
          {"i", "s"},
          "<leader><Tab>",
          function() require('luasnip').jump(1) end,
          {silent = true}
          )
          vim.keymap.set(
          {"i", "s"},
          "<leader><S-Tab>",
          function() require('luasnip').jump(-1) end,
          {silent = true}
          )
        end,
      },
    },

    config = function()
      require('trouble').setup()

      local cmp = require'cmp'
      cmp.setup({
        snippet = {
          -- REQUIRED - you must specify a snippet engine
          expand = function(args)
            require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
            -- vim.snippet.expand(args.body) -- For native neovim snippets (Neovim v0.10+)
          end,
        },
        window = {
          completion = cmp.config.window.bordered(),
          documentation = cmp.config.window.bordered(),
        },
        mapping = cmp.mapping.preset.insert({
          ['<C-b>'] = cmp.mapping.scroll_docs(-4),
          ['<C-f>'] = cmp.mapping.scroll_docs(4),
          ['<C-Space>'] = cmp.mapping.complete(),
          ['<C-e>'] = cmp.mapping.abort(),
          ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
        }),
        sources = cmp.config.sources({
          { name = 'nvim_lsp' },
          { name = 'luasnip' }, -- For luasnip users.
        }, {
          { name = 'buffer' },
        })
      })
    end
  },
  {
    'neovim/nvim-lspconfig',
    dependencies = {
      { "folke/neodev.nvim" }
    },
    config = function()
      -- Set up lspconfig.
      local keymap = vim.keymap
      local on_attach = function(client, bufnr)
        local opts = { noremap = true, silent = true, buffer = bufnr }
        keymap.set("n", "gf", "<cmd>Lspsaga lsp_finder<CR>", opts) -- show definition, references
        keymap.set("n", "gD", "<Cmd>Lspsaga goto_definition<CR>", opts) -- got to declaration
        keymap.set("n", "gd", "<cmd>Lspsaga peek_definition<CR>", opts) -- see definition and make edits in window
        keymap.set("n", "gi", "<cmd>lua vim.lsp.buf.implementation()<CR>", opts) -- go to implementation
        keymap.set("n", "<leader>ca", "<cmd>Lspsaga code_action<CR>", opts) -- see available code actions
        keymap.set("n", "<leader>rn", "<cmd>Lspsaga rename<CR>", opts) -- smart rename
        keymap.set("n", "<leader>D", "<cmd>Lspsaga show_line_diagnostics<CR>", opts) -- show  diagnostics for line
        keymap.set("n", "<leader>d", "<cmd>Lspsaga show_cursor_diagnostics<CR>", opts) -- show diagnostics for cursor
        keymap.set("n", "[d", "<cmd>Lspsaga diagnostic_jump_prev<CR>", opts) -- jump to previous diagnostic in buffer
        keymap.set("n", "]d", "<cmd>Lspsaga diagnostic_jump_next<CR>", opts) -- jump to next diagnostic in buffer
        keymap.set("n", "K", "<cmd>Lspsaga hover_doc<CR>", opts) -- show documentation for what is under cursor
        keymap.set("n", "<leader>o", "<cmd>LSoutlineToggle<CR>", opts) -- see outline on right hand side
        keymap.set("n", "gr", "<cmd>lua vim.lsp.buf.references()<CR>", opts)
        vim.keymap.set("n", "<C-n>", ":cnext<CR>")
        vim.keymap.set("n", "<C-p>", ":cprev<CR>")
      end

      local capabilities = require("cmp_nvim_lsp").default_capabilities()

      -- # Language Servers
      --   https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
      for _,server in ipairs({
        'bitbake_language_server',
        "clangd",         -- C/C++ | clang
        "ts_ls",          -- javascript | typescript-language-server
        "lua_ls",         -- lua (but not init.lua entirely, hence why neodev)
        "jdtls",
        "html",
        "cssls",          -- ccs | vscode-css-languageserver
        "rust_analyzer",  -- rust | rust-analyzer 
        "eslint",         -- javascript | eslint
        'vimls',          -- vimscript | vim-language-server
        'html',           -- html
        'jsonls',         -- jsonls
        "pyright",        -- python
        "bashls",         -- bash | bash-language-server
        "gopls",
        "emmet_ls",
        "marksman"}) do
        require("lspconfig")[server].setup({
          capabilities = capabilities,
          on_attach = on_attach
        })
      end

      -- # specialized config for some LSPs which have non-ideal defaults
      --
      -- require('lspconfig')['java_language_server'].setup{ cmd = { "/usr/share/java/java-language-server/lang_server_linux.sh" }, root_dir = function () return vim.fn.getcwd() end }
      -- configure html server
      require('lspconfig')["html"].setup({
        init_options = {
          configurationSection = { "html", "css", "javascript" },
          embeddedLanguages = {
            css = true,
            javascript = true,
          },
          provideFormatter = true,
        },
      })
      require('lspconfig')['pylsp'].setup{
        settings = {
          pylsp = {
            plugins = {
              pycodestyle = {
                ignore = {'W391'},
                maxLineLength = 100
              }
            }
          }
        }
      }
      require("lspconfig").clangd.setup {
        on_attach = on_attach,
        capabilities = capabilities,
        cmd = {
          "clangd",
          "--offset-encoding=utf-16",
        },
      }
    end
  }
}