Code Editor

Ace Editor (Javascript Mode)

You can find the offical website 
	/**
	 * In fact, you're looking at ACE right now. Go ahead and play with it!
	 *
	 * We are currently showing off the JavaScript mode. ACE has support for 45
	 * language modes and 24 color themes!
	 */
	function add(x, y) {
		var resultString = "Hello, ACE! The result of your math is: ";
		var result = x + y;
		return resultString + result;
	}
	var addResult = add(3, 2);
	console.log(addResult);

Ace Editor (Html Mode And Emmet)

You can find the offical website 
<!--
	* We are currently showing off the Html mode. ACE has support for 45
	* language modes and 24 color themes!
	 -->
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title>ACE in Action</title>
	<style>
		#editor {
			position: absolute;
			top: 0;
			right: 0;
			bottom: 0;
			left: 0;
		}
	</style>
	</head>
	<body>
	<div id="editor">function foo(items) {
		var x = "All this is syntax highlighted";
		return x;
	}</div>
	<script src="/ace-builds/src-noconflict/ace.js" charset="utf-8"></script>
	<script>
		var editor = ace.edit("editor");
		editor.setTheme("ace/theme/monokai");
		editor.getSession().setMode("ace/mode/javascript");
	</script>
	</body>
	</html>

Ace Editor (Css Editor)

You can find the offical website 

		/* Some example CSS */

		@import url("something.css");

		body {
		margin: 0;
		padding: 3em 6em;
		font-family: tahoma, arial, sans-serif;
		color: #000;
		}

		#navigation a {
		font-weight: bold;
		text-decoration: none !important;
		}

		h1 {
		font-size: 2.5em;
		}

		h2 {
		font-size: 1.7em;
		}

		h1:before, h2:before {
		content: "::";
		}

		code {
		font-family: courier, monospace;
		font-size: 80%;
		color: #418A8A;
		}