mui
MUI X: Build complex and data-rich applications using a growing list of advanced React components, like the Data Grid, Date and Time Pickers, Charts, and more!
radzenhq
Radzen Blazor is the most sophisticated free UI component library for Blazor, featuring 110+ native components including DataGrid, Scheduler, Charts, and advanced theming with full support for Material Design and Fluent UI.
keenthemes
Design-forward shadcn kit for interfaces that stand out. 1000+ free patterns!
syncfusion
Syncfusion React UI components library offer more than 50+ cross-browser, responsive, and lightweight react UI controls for building modern web applications.