CSS & CSS3
Create Custom Social Buttons Using Bootstrap 4 – bootstrap-social
A CSS extension for Bootstrap 4 that lets you create pretty nice and fully configurable social network buttons on the webpage.
9 Minimal CSS Loading Spinners
Github-style Milestone List With Bootstrap – bootstrap-milestones.css
The bootstrap-milestones.css lets you create a responsive milestone list for identifying project milestones using Bootstrap styles.
CSS Only Snow Falling Effect
8 Hamburger Toggle Animations In Pure HTML/CSS
A collection of 8 awesome toggle animations created for hamburger buttons of your mobile & desktop navigation system.
Pretty Checkbox Replacement – beautiful-checkbox.css
The beautiful-checkbox.css library allows you to beautify and change styles, sizes, and positions of the native checkbox inputs with pure CSS.
Custom Style Dropdown Select In Pure CSS – select-css
select-css is a CSS library that makes the styles of the native dropdown select consistent across browsers.
Tiny Flexbox Grid Layout In Pure CSS – infinity-css-grid
infinity-css-grid is an ultralight (less than 0.1kb ) CSS layout system that helps web developers quickly generate responsive, flexible grid layout using CSS flexbox.