Provides an interactive web environment where users can solve Codeforces problems within a built-in editor and debugger, enhancing problem-solving skills across various difficulty levels from 800 to 1900 ratings.

Provides a captcha system where the solution is hidden within image frames and requires software to solve, not humans. The challenge expires quickly and does not reveal the answer in any browser interaction.

Pocket TTS is a browser-based text-to-speech system that uses WebAssembly to run efficiently. It includes various voice options and allows for the customization of parameters like quantization levels and temperature settings.

SecURL scans websites for security vulnerabilities, providing a graded assessment of website posture, ranked findings, and specific remediation steps without requiring any configuration or credentials.

Dart Live allows users to write, compile, run, and debug Dart applications in the browser. It leverages WebAssembly for compiling Dart source code into executable form and running it through an ARM simulator. The environment also includes real-time type checking and diagnostics via a built-in analyzer.

Provides a dark theme for the Hacker News website that is specifically tuned for OLED iPhone screens. The feature ensures that the dark mode persists across navigation, allowing users to tap once on HN and continue browsing in dark mode without additional actions.

Provides an experimental collection of fifty unconventional methods for achieving vertical centering, each presented as a separate page. Methods range from humorously restrictive to technically correct but theatrically wrong approaches.

Provides a collection of 29 themed component libraries for the shadcn/ui framework. Users can install any component with one command, making it easy to integrate different design styles into their projects.

Offers a range of services including custom software, mobile apps, UI/UX design, AI automation, web development, and idea validation. Each service is designed to integrate seamlessly with others provided by the same company.

Provides declarative React components and state helpers for integrating Codex pet spritesheets into web applications. It includes sprite animations, fixed-position rendering with drag-and-drop functionality, and integration with app states via reducers and hooks.

Provides a framework-agnostic solution to create Keynote-style text trace animations using SVG. It offers bindings for Vue and React, along with features like per-glyph styling, accessibility support, and integration options for custom fonts.

뷰 전환 기능을 쉽게 사용할 수 있도록 다양한 유틸리티 함수를 제공합니다. 이 툴킷은 피처 감지, 시뮬레이션 지원, 애니메이션 유틸리티, 전환 재생 제어 등 여러 모듈로 구성되어 있습니다.

Agent MCP Studio is a platform that enables users to build multi-agent MCP (Multi-Conversation Protocol) systems directly within a browser tab. It provides an AI playground for experimenting with and developing these complex systems without requiring local setup or configuration.

Provides elegant default styling for all standard HTML elements without requiring additional classes. Includes dark mode and integrates well with existing styles.

Humanoid.js is a tool designed to analyze interaction signals in real-time, providing metrics such as pressure, displacement, and curvature to determine the humanness of user inputs. It supports multi-touch and trajectory visualization.

Provides a high-performance landing page template for creative agencies built using Svelte 5, GSAP 3 (ScrollTrigger, ScrollToPlugin), and Tailwind CSS v4. It includes features like spatial typography, hardware-accelerated stacking, parallax marquee, and smooth scroll navigation.

SharpSkill provides an in-depth understanding of technical stacks through real-world question training to help users prepare for interviews.

WebGL Liminal Space는 웹 기반의 그래픽 렌더링 기술을 활용하여 중간 공간의 경험을 시뮬레이션하거나 시각화하는 도구입니다. 사용자는 웹 브라우저 내에서 실시간 그래픽 효과를 통해 이질적인 공간을 탐색할 수 있습니다.

GizmoSauce provides no-code website widgets primarily for store locator functionality. It allows businesses to embed interactive store locators directly on their websites without requiring coding skills. The platform is demonstrated through a store locator widget implemented on the Little Caesars website.

Snorb allows users to create, edit, and play Lemming-like game levels in a web browser. Users can customize various aspects of the level such as water level, tools available, reproduction settings, and more.

Lumina is a programming language that combines safety and web compatibility. It offers HM type inference, algebraic types, and trait-based polymorphism. It can be compiled to both JavaScript and WebAssembly, allowing developers to build reactive UIs, WebGPU workloads, and WASM modules using a unified language and type system.

FastFN allows developers to build APIs and single-page applications using multiple programming languages in a single project. It provides a simple CLI and file-based routing system that supports Python, Node.js, PHP, Lua, Rust, and Go.

ArrowJS is a reactive UI framework built with JavaScript primitives. It allows developers to create fast, maintainable web applications with no build step required. The framework supports rendering inline DOM directly and can isolate component logic inside Web Assembly sandboxes.

The Htmx Toolkit for VS Code provides IntelliSense, hover documentation, validation, and snippets for HTMX. It enhances the development experience by offering smart completions and error detection across multiple template languages.