The 23 best lightweight CSS frameworks for creating responsive websites and web applications are listed in order of their features and benefits. These frameworks include Bulma, UIKIT, Mini.css, Skeleton, HiQ, Pure.css, Milligram, Fictoan, Spectre.css, Wing, Chota, Turretcss, Tachyons, InvisCSS, Spark, Tailwind CSS, Materialize CSS, Avalanche, Beauter, Vanilla Framework, Vital, Fluidity, and Typebase.css. Each framework has its unique features, benefits, and use cases, making it essential to choose the right one for specific projects. The frameworks are categorized into utility-based, modular, responsive, and customizable options, allowing developers to select the best fit for their needs. With these lightweight CSS frameworks, developers can create efficient, responsive web design testing solutions and build top-notch user interfaces with minimal styling complications.