Frontend/UI

6 open source tools compared. Sorted by stars. Scroll down for our analysis.

Tool	Stars	Velocity	Language	License	Score
Tailwind CSS Utility-first CSS framework	95.0k	+118/wk	TypeScript	MIT License	86
UnoCSS Instant on-demand atomic CSS engine	18.8k	+5/wk	TypeScript	MIT License	81
Redux Toolkit Official batteries-included Redux toolset	11.2k	+4/wk	TypeScript	MIT License	85
SkiaSharp SkiaSharp is a cross-platform 2D graphics API for .NET platforms based on Google's Skia Graphics Library. It provides a comprehensive 2D API that can be used across mobile, server and desktop models to render images.	5.4k	+12/wk	C#	MIT License	75
flipoff Free split-flap display emulator for any TV. The classic flip-board look, without the $3,500 hardware.	2.9k	+9/wk	JavaScript	Not specified	59
tiny-vue TinyVue is an enterprise-class UI component library of OpenTiny community, support both Vue.js 2 and Vue.js 3, as well as PC and mobile.	2.2k	+2/wk	Less	MIT License	71

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Our Analysis

Tailwind CSS95.0k★

Tailwind flips the usual CSS approach: instead of writing classes in a separate file, you apply small utility classes directly in your markup. `class="flex items-center gap-4 bg-zinc-900 p-6 rounded-lg"`. That's your styling, right there in the HTML. No context-switching to a stylesheet. MIT licensed, used by basically every modern frontend framework. Tailwind v4 rewrote the engine. It's faster, uses CSS-native features like cascade layers, and the config moved from JavaScript to CSS. The ecosystem is massive: Tailwind UI (paid component library), Headless UI (free accessible components), and thousands of community component libraries. The framework itself is completely free. CLI, PostCSS plugin, Vite plugin. All free, all MIT licensed. No paid tier for the core framework. Tailwind UI is the paid product: $299 one-time for every component and template they've built. It's optional. You can build everything yourself or use free community alternatives like shadcn/ui or DaisyUI. Solo to large teams: the framework is free. Period. The question is whether to buy Tailwind UI to save design time, and at $299 one-time, the math works out immediately if it saves you even a day of work. The catch: your HTML gets verbose. Long class strings are polarizing. Some developers love the co-location, others find it unreadable. And Tailwind is opinionated about design tokens. If your design system doesn't align with Tailwind's spacing/color scale, you'll fight the config.

UnoCSS18.8k★

UnoCSS is an on-demand atomic CSS engine that generates only the utility classes your code actually uses, at build time with near-zero overhead. Same utility-first approach as Tailwind, but the engine is fundamentally different: regex-based extraction, instant HMR, and a preset system that can emulate Tailwind, Windi CSS, Bootstrap, or your own custom utilities. TypeScript. The speed difference is measurable. UnoCSS generates CSS in milliseconds where Tailwind's JIT takes longer on large projects. The preset architecture means you're not locked into one utility naming convention. Want Tailwind classes? Use the Tailwind preset. Want something custom? Write a preset in a few lines. Fully free. No paid tier, no cloud service, no premium presets. MIT-equivalent license. Solo to large teams: free. Drop it into Vite, Webpack, Nuxt, Astro, or SvelteKit. The Tailwind compat preset means migration from Tailwind is possible without rewriting your templates. The catch: UnoCSS has a smaller ecosystem than Tailwind. Component libraries like shadcn, DaisyUI, and Flowbite are built for Tailwind specifically. The Tailwind preset covers most classes but edge cases will break. If your team relies on Tailwind's documentation and component ecosystem, switching has a real cost beyond the CSS engine itself.

Redux Toolkit11.2k★

Redux Toolkit is the official way to use Redux without the boilerplate that made old Redux painful. It wraps Redux with sensible defaults: built-in immutable updates, auto-generated action creators, and a data fetching layer called RTK Query. MIT license, TypeScript-first. This is NOT a separate library from Redux: it IS how you're supposed to use Redux now. The old pattern of writing action types, action creators, and reducers separately is dead. Redux Toolkit gives you `createSlice` which generates all three from one function. Fully free. No paid tier, no hosted version. It's a dependency in your package.json. Every team size: free. The real question isn't cost; it's whether you need Redux at all. For simple apps, React's built-in useState and useContext are enough. Redux Toolkit earns its place when you have complex state interactions across many components, or when you need RTK Query's caching and invalidation. The catch: Redux still adds conceptual overhead. Actions, reducers, selectors, middleware, the mental model is heavy compared to simpler alternatives like Zustand or Jotai. RTK Query is powerful but competes with React Query/TanStack Query, which many developers find more intuitive. If you're starting fresh and don't already know Redux, try Zustand first.

SkiaSharp5.4k★

SkiaSharp gives .NET developers access to Skia, the same 2D rendering engine that powers Chrome, Android, and Flutter. Cross-platform from day one across Windows, macOS, Linux, iOS, Android, and WASM. Free and MIT-licensed. This is the answer for .NET apps that need to draw beyond what System.Drawing or WPF provides (System.Drawing is being deprecated cross-platform anyway). PDFs, charts, image manipulation, custom controls in MAUI or Avalonia. The API is procedural and predictable. Not particularly hand-holding, but the docs are decent. This is a primitive, not a product. There's no paid tier. You ship it inside your app via NuGet. Solo, small team, large team: same setup, just `dotnet add package SkiaSharp`. Performance is good because the heavy lifting is native code under the hood. The catch is that the cross-platform native binaries can be a deployment headache. AOT compilation, mobile linking, and self-contained publishing all need attention. Test your release builds on every target platform you care about, not just the one your dev machine runs.

tiny-vue2.2k★

TinyVue is an enterprise Vue component library from Huawei's OpenTiny team, covering 100+ components: data tables, forms, charts, and complex layouts. Supports both Vue 2 and Vue 3 from the same package, which is useful if you are maintaining a migration. MIT-licensed, fully free. No server setup. Install via npm and use it. The library uses a renderless architecture that separates logic from templates, making it relatively easy to customize without forking. Charts and form components are built in, which reduces dependency sprawl for enterprise dashboards. Vue teams building enterprise admin panels and internal tools should evaluate this alongside Element Plus and Ant Design Vue. Component breadth is competitive. The main consideration is documentation quality: comprehensive but primarily Chinese, with English translations that lag main releases. The catch: community support is predominantly Chinese-language. Debugging edge cases or finding answers on Stack Overflow is harder than with Element Plus or Ant Design Vue. If that friction bothers you, pick the more globally-adopted library.