Material Design is absolutely free and go to use it.
Materialize comes in two different forms.
1. Download Library. Click Here !
2. Content Delivery Network ( CDN Online Links)
<!-- CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/css/materialize.min.css">
<!-- JavaScript -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/js/materialize.min.js"></script>
After downloading, extract the files into the directory where your website is located. Your directory will look something like this.
You'll notice that there are two sets of the files. The min means that the file is "compressed" to reduce load times. These minified files are usually used in production while it is better to use the unminified files during development.
<!DOCTYPE html>
<html>
<head>
<title>Materialize CSS</title>
<!--Responsive Meta Tag-->
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<!--Import Google Icon Font-->
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<!--Import materialize.css-->
<link type="text/css" rel="stylesheet" href="css/materialize.min.css" />
</head>
<body>
<h1>Free Time Learn</h1>
<h2>Free Time Learning</h2>
<h3>www.freetimelearning.com</h3>
<!--Import jQuery Library-->
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<!--Import materialize.js-->
<script type="text/javascript" src="js/materialize.min.js"></script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<title>Materialize CSS</title>
<!--Responsive Meta Tag-->
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
<!--Import Google Icon Font-->
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
<!--Import materialize.css-->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/css/materialize.min.css">
</head>
<body>
<h1>Free Time Learn</h1>
<h2>Free Time Learning</h2>
<h3>www.freetimelearning.com</h3>
<!--Import jQuery Library-->
<script type="text/javascript" src="https://code.jquery.com/jquery-3.2.1.min.js"></script>
<!--Import materialize.js-->
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/js/materialize.min.js"></script>
</body>
</html>