MUI Core: Ready-to-use foundational React components, free forever. It includes Material UI, which implements Google's Material Design.
A cross-browser library of CSS animations. As easy to use as an easy thing.
A utility-first CSS framework for rapid UI development.
Apache ECharts is a powerful, interactive charting and data visualization library for browser
Material Design icons by Google
Iconic font aggregator, collection, & patcher. 3,600+ icons, 50+ patched fonts: Hack, Source Code Pro, more. Glyph collections: Font Awesome, Material Design Icons, Octicons, & more
FCC China open source codebase and curriculum. Learn to code and help nonprofits.