Devtips suggested three things to make websites responsive without using a css framework which I find it more effective than actually using the framework itself. Meta tag, html structure, and media queries. Media queries will help you more on how you want your site look like on smaller screens. Since I learned on how to use media queries, I merely use a framework on some of the webpages I am creating. Have you ever tried these? Give it a try and it will help you to be more efficient in terms of creating responsive web pages.