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react-data-grid is a high-performance tabular interface for rendering and manipulating large datasets within a React application. It functions as a virtualized data table and editable spreadsheet component that supports hierarchical data grids with expandable and collapsible row groupings. The component maintains performance with massive datasets by rendering only the rows and columns currently visible in the viewport. It provides spreadsheet-like data manipulation, including cell editing and the ability to copy, paste, or drag values between cells. The grid supports advanced layout capabili

Neat is a Sass grid framework and responsive layout system used to build fluid, column-based web architectures. It provides a structured approach to managing layout properties and global design settings through a central configuration map and a toolset of Sass mixins and functions. The system is distinguished by its ability to handle nested grid architectures, allowing flexible grids to be placed inside other grid containers while maintaining precise alignment and gutter control. It also includes development tools for frontend layout debugging that render background guide lines to visualize c

Susy is a Sass layout framework and grid computation engine designed to automate complex mathematical layout calculations within stylesheets. It functions as a responsive grid generator that calculates column widths, gutters, and spans based on customizable viewport breakpoints to ensure precise element alignment. The system includes a visual layout debugger that generates browser-based grid overlays to verify column alignment and baseline rhythm during development. It also provides utilities for creating repeating background colors and gradients using a template-based syntax. The framework