return {
	{
		'nvim-treesitter/nvim-treesitter',
		build = ':TSUpdate',
		event = { "VeryLazy" },
		lazy = vim.fn.argc(-1) == 0,
		opts =  {
			ensure_installed = {
				"bash",
				"bibtex",
				"c",
				"cpp",
				"css",
				"go",
				"html",
				"http",
				"javascript",
				"json",
				"latex",
				"lua",
				"python",
				"typescript",
				"tsx",
				"vim",
			},
			sync_install = false,
			highlight = {
				enable = true,
			},
		},
	},

	--
	-- Autocompletion
	--
	{
		'ms-jpq/coq.artifacts',
		branch = 'artifacts'
	},
	{
		'ms-jpq/coq_nvim',
		dependencies = { 'ms-jpq/coq.artifacts' },
		branch = 'coq',
		build = ':COQdeps',
		config = function()
			vim.cmd([[autocmd VimEnter * COQnow -s]])
		end
	},

	--
	-- Language Configurations
	--
	{ 'ap/vim-css-color', lazy = false },
	-- close tags in html languages
	{
		'alvan/closetag.vim',
		ft = { "html", "vue", "typescriptreact" },
	},

	{
		'udalov/kotlin-vim',
		ft = 'kotlin'
	},

	{ 'bellinitte/uxntal.vim', lazy = false },

	--
	-- Language Server
	--

	-- Show Code Outline/Symbols tree window
	{
		'stevearc/aerial.nvim',
		opts = {
			backends = { 'lsp', 'markdown', 'man' },
			layout = {
				min_width = 25
			},
		},
		keys = {
			{'<Leader>e', ':AerialToggle<LF>'},
		}
	},

	-- Language Server Installer
	{
		'williamboman/mason.nvim',
		cmd = {
			"Mason",
			"MasonInstall",
			"MasonUpdate",

		},
		opts =  {
			ui = {
				icons = {
					package_installed = "i",
					package_pending = "p",
					package_uninstalled = "u"
				},
			},
		},
	},
	{
		'neovim/nvim-lspconfig',
		config = function()
			-- disable inline error messages
			vim.diagnostic.config({ virtual_text = false })
		end
	},
	{
		'williamboman/mason-lspconfig.nvim',
		dependencies = {
			'ms-jpq/coq_nvim',
			'nanotee/nvim-lsp-basics',
			'neovim/nvim-lspconfig',
			'stevearc/aerial.nvim',
			'williamboman/mason.nvim',
		},
		opts = {
			ensure_installed = {
				"bashls",
				"clangd",
				"ast_grep",
				"gopls",
				"html",
				"jsonls",
				"lua_ls",
				"pyright",
				"texlab",
				"tsserver"
			},
		},
		ft = {
			"bash",
			"c",
			"cpp",
			"dart",
			"go",
			"html",
			"javascript",
			"javascriptreact",
			"json",
			"lua",
			"python",
			"tex",
			"typescript",
			"typescriptreact",
		},
		config = function()
			local masonlsp = require 'mason-lspconfig'
			--[[
			masonlsp.setup 
			--]]
			masonlsp.setup_handlers {
				function(server_name)
					require('lspconfig')[server_name].setup(require('coq').lsp_ensure_capabilities {
						on_attach = function(client, bufnr)
							local basics = require('lsp_basics')
							basics.make_lsp_commands(client, bufnr)
							basics.make_lsp_mappings(client, bufnr)
						end
					})
				end
			}
		end
	},

	-- Show code diagnostics in a separate buffer window
	{
		'folke/trouble.nvim',
		opts = {
			height = 6,
			icons = false,
			fold_open = "v",
			fold_closed = ">",
			signs = {
				error = "E:",
				warning = "W:",
				hint = "H:",
				information = "I:"
			},
			use_diagnostic_signs = false
		},

		cmd = {
			"TroubleToggle",
		},

		keys = 	{
			{'<Leader>t', ':TroubleToggle<CR>'},
		}
	},
	--
	-- Markdown Live Preview
	--
	{
		"iamcco/markdown-preview.nvim",
		ft = 'markdown',
		config = function()
			vim.fn["mkdp#util#install"]()
			vim.g.mkdp_theme = 'light'
		end
	},

	--
	-- Misc
	--
	{
		"rest-nvim/rest.nvim",
		dependencies = { "nvim-lua/plenary.nvim" },
		opts = {
			-- Open request results in a horizontal split
			result_split_horizontal = true,
			-- Keep the http file buffer above|left when split horizontal|vertical
			result_split_in_place = true,
			result = {
				show_curl_command = false,
			},
		},
		keys = {
			{'<Leader>r', '<Plug>RestNvim<CR>'},
			{'<Leader>R', '<Plug>RestNvimLast<CR>'},
			{'<Leader><A-r>', '<Plug>RestNvimPreview<CR>'},
		},
		config = function()
			-- commands
			local ct = require('conftool')
			ct.defcmd('RestNvim', 'lua require(\'rest-nvim\').run()<CR>')
			ct.defcmd('RestNvimPreview', 'lua require(\'rest-nvim\').run(true)<CR>')
			ct.defcmd('RestNvimLast', 'lua require(\'rest-nvim\').last()<CR>')
		end,
	},
}