Pure CSS Responsive Modal Popup Library – modal.css
A lightweight library for creating responsive modal windows with fade-in animations using checkboxes, CSS flexbox, and CSS3 transitions.
CSS & CSS3
Retro Windows 95 UI Framework in Pure CSS – 95CSS
Build Windows 95-style forms, dialogs, tabs, buttons, and layouts with 95CSS, a UI framework built in pure CSS.
Customizable Smooth CSS Animation Library – AnimXYZ
A lightweight, fast, performant, customizable, and utility-first CSS3 animation library for HTML, Vue, and React.
Pure CSS Text Highlights with Arrows – neat-annotations
Mark product copy, documentation, or UI text with handwritten CSS labels, eight arrow directions, and optional animated rainbow accents.
iOS-Style Smooth Squircle Corners for the Web – CornerKit
A tiny JavaScript library for iOS-style smooth squircle corners. Zero dependencies, 98%+ browser support, 60fps performance.
ds.css: Nintendo DS Lite UI Framework in Pure CSS
Add Nintendo DS Lite visuals to your web app with ds.css. Use themed buttons, radio inputs with selection colors, alert loading animations, and a full Pictochat chat UI.
EaseMotion CSS: Animation-First UI Framework
Build hover effects, staggered entrances, and scroll reveals with EaseMotion CSS, a zero-dependency framework you can drop in from a CDN.
Accessible Themeable Pure CSS Framework – µCSS
A pure CSS framework with 20 color themes, 18 components, and a 12-column grid. No JavaScript required.
Right-to-left (RTL) Theme For Boostrap 4.x
A full-featured Bootstrap Right-to-left (RTL) theme for Arabic, Aramaic, Azeri, Dhivehi/Maldivian, Hebrew, Kurdish (Sorani), Persian/Farsi, Urdu languages.
Terminal-Inspired CSS Library for Retro Web UI – WebTUI
Create terminal-inspired web interfaces with WebTUI, a lightweight CSS library featuring modular components and theme plugins like Nord and Catppuccin.