Watermelon UI
Watermelon UI is a free, MIT-licensed React component registry for Tailwind CSS and shadcn/ui. Browse 800+ source-backed examples spanning animated components, landing-page blocks, dashboards, and templates. Copy the code into your project or install with the shadcn CLI. Built with React, Tailwind CSS v4, Radix UI, and Motion. Includes a public API, llms.txt, OpenAPI, and a hosted MCP server so agents can search and pull installable source. No signup required. Open source under the MIT license on GitHub (WatermelonCorp/watermelon-platform).
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Realm
Realm is a mobile-first, open source object database designed to run directly inside phones, tablets, and wearables. It provides a simple, object-oriented data model that eliminates the need for an ORM, allowing developers to define models as regular classes in languages like Swift, Java, Kotlin, C#, JavaScript, Dart, and C++. Realm's architecture ensures high performance and low memory usage by employing a zero-copy design, lazy loading, and multi-version concurrency control (MVCC) for thread-safe operations. It's live objects and collections automatically update across threads, enabling reactive programming patterns. Realm supports relationships between objects via links and backlinks, facilitating complex data structures. Developers can utilize tools like Realm Studio to inspect and manipulate local Realm databases and integrate Realm into various platforms, including React Native, Flutter, Xamarin, and Node.js.
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Sanity
Sanity is a Content Operating System designed to power modern content applications and AI-driven workflows. It combines a flexible headless CMS, real-time collaboration tools, and a scalable content database called Content Lake. Developers can configure Sanity Studio with TypeScript and React to build fully customized content workspaces. The platform supports visual editing, structured content modeling, and powerful querying using GROQ. With built-in compute and AI capabilities, teams can automate workflows and trigger serverless functions based on content changes. Sanity integrates seamlessly with popular frameworks like Next.js, React, Vue, and many others. It enables organizations to build, manage, and scale content-driven experiences without backend limitations.
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TanStack
TanStack is an open source, framework-agnostic collection of high-quality, headless, and type-safe utilities designed for modern web development, offering powerful capabilities in state management, data fetching, routing, UI logic, tables, data grids, charts, and reactive client-side storage. Its ecosystem includes core libraries such as TanStack Query for asynchronous server-state fetching and caching, TanStack Router for full-stack and client-side routing with full TypeScript inference and URL state support, and TanStack Table for headless, customizable tables and data grids across TS/JS frameworks. Additional tools, such as TanStack DB, extend the reactive store with live queries and optimistic mutations, while frameworks like TanStack Start provide a full-stack React experience, including SSR, streaming, server functions, and bundling, powered by its own router and Vite. Collectively, TanStack tools emphasize developer control, performance, scalability, and type safety.
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