4. Rwd RetrofitAllows an existing desktop site to co-exist with a responsive site, while also able to serve the desktop site to a different breakpoint on "mobile"
5. SuziA mature, feature-rich, responsive Sass and Grunt UI framework
6. Layout EngineAdds the rendering engine name as a class on the html tag and returns a JavaScript object containing the vendor, version and browser name (where appropriate)
7. MqgenieAdjusts CSS media queries in browsers that include the scrollbar width in the viewport width so they fire at the intended size
8. Quench VueSimple, client-side hydration of pre-rendered Vue.js apps
9. Jquery RwdimagesAllows responsive content images using the redux spacer technique (http://mattstow.com/experiment/responsive-images-redux/responsive-images-redux-jquery-plugin.html) to be shared and saved
10. EqioA simple, tiny alternative to element/container queries
12. hucssleyHucssley - a full-featured, consistent, atomic utility class library for rapidly building performant UI
13. Class-QueryA simple method to help manage responsive content (and an alternative to element queries as an added bonus)