Collection of free CSS mix-blend-mode pens. More examples: https://freefrontend.com/css-mix-blend-mode-examples/

Collection of CSS mask pens. More examples: https://freefrontend.com/css-mask-examples/

Collection of free CSS gradient pens. More CSS gradient examples: https://freefrontend.com/css-gradient-examples/

Collection of free CSS flexbox pens. More examples: https://freefrontend.com/css-flexbox-examples/

Collection of free CSS filter code examples. More: https://freefrontend.com/css-filter-examples/

Collection of free CSS custom properties (variables) examples. More: https://freefrontend.com/css-custom-property-variables-examples/

Collection of free CSS clip-path code examples. More: https://freefrontend.com/css-clip-path-examples/

Collection of free CSS box-shadow code from Codepen and other resources. More examples: https://freefrontend.com/css-box-shadow-examples/

Collection of free CSS background-clip code examples from Codepen and other resources. More examples: https://freefrontend.com/css-background-clip-examples/