Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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kgb
Function spies for Python unit tests that intercept, record, and reroute calls without heavy-handed mocking.
BlendModes
Apply Photoshop-style layer blend modes to images in Python with NumPy and Pillow
configcat-js
Official JavaScript SDK for evaluating ConfigCat feature flags and remote config values directly in the browser.
i18next-pseudo
A pseudolocalization post-processor for i18next that stretches and re-letters strings to surface UI and translation bugs before real translations arrive.
jotai-x
jotai-x auto-generates type-safe hooks, providers, and scoped state stores on top of Jotai.
react-dropzone-esm
An ESM/CJS-ready fork of react-dropzone for drag-and-drop file uploads in React.
estree-util-build-jsx
Converts JSX embedded in an ESTree syntax tree into React.createElement or automatic jsx-runtime calls.
Untitled UI Icons React
1,100+ hand-crafted Untitled UI icons packaged as tree-shakeable, typed React components.
retryhttp
Retry transient HTTP errors in httpx, requests, and aiohttp with sensible, fully customizable defaults.
use-device-pixel-ratio
A React hook that returns the device pixel ratio and reacts to changes across displays.
cssinjs-utils
Typed CSS-in-JS helper utilities that power Ant Design's style-generation, token-calculation, and CSS-variable pipeline.
React Data Grid (Grafana Fork)
A virtualized, keyboard-accessible React data grid with sorting, inline editing, row grouping, and frozen columns.
@posthog/brand
PostHog's official brand assets — logo, colors, RoundHog font, and hedgehog illustrations as React components
react-split-pane
A resizable, nestable split-pane React component for building draggable panel layouts.
tinacms
Git-backed headless CMS that gives React apps live, in-context Markdown editing and a generated GraphQL content API.
Sanity
Sanity Studio is the open-source, config-driven React framework you customize and deploy as the editing UI for Sanity's real-time content backend.
gluestack-ui
A CLI that adds accessible, Tailwind-styled universal components straight into React & React Native codebases
Agent-Native
A full-stack TypeScript framework where AI agents and UI share the same actions, database, and context.
Takumi
Rust rendering engine that turns JSX, HTML, and node trees into images without a headless browser
Semiotic
A React data-visualization library for network graphs, streaming data, and coordinated dashboards, built for AI-assisted development.
Skybridge
The full-stack TypeScript framework for building type-safe MCP Apps and ChatGPT Apps.
fate
A Relay-inspired data client for React with normalized caching, view composition, and type-safe fetching.
performative-ui
A tongue-in-cheek React component library for building AI-startup landing pages
rc-trigger
Low-level React popup trigger and alignment primitive
