21st dev - AI Agent & Component Library

21st dev - AI Agent & Component Library

21st dev The fastest way to ship AI agents - components, agent templates, and SDK backed by Y Combinator

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Overview

21st.dev is a community platform for AI UI components and agent templates, backed by Y Combinator.\n\n## Features\n- UI Components: Curated collection of AI-powered UI components (prompt boxes, AI chat interfaces, animated inputs)\n- Agent Templates: Ready-to-use AI agent templates for web scraping, API design, customer support, data analysis, lead research, and more\n- Agents SDK: Build agents with built-in UI, chat history, spend limits, E2B sandbox execution, and observability\n- MCP Support: Connect to Model Context Protocol servers\n- Private Registry: Host your own component library\n\n## Popular Agent Templates\n- Web Scraper Agent\n- Support Agent (Notion/Slack)\n- Data Analyst (Amplitude)\n- Deep Researcher\n- GitHub Agent\n- Lead Research Agent\n\nBuilt-in SDK features: E2B Sandboxes, token streaming, auth & rate limits, session replay & traces.

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Flower Wand Garden

Flower Wand Garden

Flower Wand Garden - a free camera-powered flower toy that turns your fingertip into a magic wand for photos and videos

Flower Wand Garden Flower Wand Garden is a free, browser-based flower toy that turns any phone or computer camera into a magical planting ground. Flower Wand Garden detects your index fingertip in real time using MediaPipe hand landmark tracking and turns every gesture into blooming flowers that decorate the live camera view. There is no app to install, no account to create, and no video editor to learn. You simply allow the camera, hold your finger still for one second, and watch a flower blossom right on your screen. Key Takeaways (TL;DR) Flower Wand Garden requires zero setup: open the page, allow camera access, and start planting flowers immediately Every bloom is drawn with original art and soft animations, so results look playful and handcrafted rather than generic Users can capture the finished scene as a clean JPEG photo or a 15-second vertical video clip All hand tracking and media composition happen locally in the browser, which keeps camera data private by default The tool is completely free, with no accounts, subscriptions, or forced watermarks (an optional watermark can be toggled off) Table of Contents What is Flower Wand Garden? How flower wand garden works Camera tracking made simple Photo mode and video mode Privacy by design Who is Flower Wand Garden for? Pro tips for better results What is coming next Flower Wand Garden FAQ What is Flower Wand Garden? Flower Wand Garden is a camera-powered flower toy for people who want to make something beautiful in seconds. Instead of drawing on a blank canvas, you plant flowers directly into your own living space. The camera frames whatever is in front of you — a desk, a garden, a birthday table, or a child's face — and Flower Wand Garden grows animated flowers wherever you point your finger. The interaction is deliberately simple. A small progress ring appears at your fingertip. Hold still for one second and the ring fills, planting the first flower. Keep holding and more flowers appear every half second, letting you draw flower borders, clusters, and trails across the scene. Release, move to a new spot, and plant again. The whole experience feels like waving a magic wand, which is exactly what the name promises. How flower wand garden works The magic happens in three steps. First, you allow camera access — the site asks permission once and explains exactly why the camera is needed. Second, you point at the scene and pause; a progress ring shows that the gesture is being recognized. Third, you capture the moment as a photo or a short video clip. Because the experience is built for the browser, it works on phones, tablets, and laptops without any downloads. This makes it perfect for spontaneous creativity: at a party, in a classroom, or during a quiet afternoon at home, Flower Wand Garden is always one tab away. Camera tracking made simple Under the hood, Flower Wand Garden uses 21 hand landmarks to track the index fingertip precisely. The tracking is tuned to feel forgiving: you don't need perfect lighting or a steady hand to see results. A visible progress ring gives immediate feedback, so even young children can understand what to do within seconds. The tips section of the site covers practical improvements for tracking — good lighting, palm facing the camera, and a comfortable distance. These small adjustments make a noticeable difference, and the site explains them clearly for people who have never used camera apps before. Photo mode and video mode When your flower arrangement is ready, you can capture it in two ways. Photo mode produces a clean JPEG that combines the camera frame with the planted flowers, and it deliberately excludes the tracking skeleton so the final image looks natural. Video mode records up to 15 seconds of footage with a built-in timer and auto-stop, which is ideal for TikTok, Reels, and Shorts. Both outputs are easy to share. Where the device supports it, Flower Wand Garden opens the native share sheet; otherwise it downloads the file directly. No editor, no export settings, no watermark required. Privacy by design A camera tool carries a responsibility, and Flower Wand Garden takes privacy seriously. All hand detection and media composition are performed locally in the browser; nothing is uploaded to a server. The camera feed exists only on your device, and you choose exactly what to share and when. This local-first approach is a core reason why families and educators can trust the tool with children. Who is Flower Wand Garden for? The audience is wonderfully broad. Families use it as a playful activity for birthdays and parties, turning the camera into a flower-themed photo booth. Teachers use it in classrooms to teach patience, steady poses, symmetry, and even the basics of computer vision. Casual creators use it to produce vertical clips for social media without opening a video editor. Anyone who enjoys gentle, creative play can find joy in Flower Wand Garden. Pro tips for better results For the best blooms, sit near a window or a soft light source so the hand is well lit. Keep your palm facing the camera and hold your finger about an arm's length away. Move deliberately rather than quickly, and let the progress ring fill completely before changing position. These simple habits make tracking smoother and arrangements more precise. What is coming next The roadmap includes a moderated Public Garden where users can share their creations, seasonal flower collections, color themes, constellation drawing, and collaborative sessions. The first release focuses on getting the core gesture right, and the future features build on that foundation. Flower Wand Garden FAQ Q: Is Flower Wand Garden really free? A: Yes. There are no payments, tiers, or subscriptions anywhere on the site. Q: Does Flower Wand Garden upload my camera feed? A: No. All processing happens locally in the browser, and nothing is uploaded. Q: Which devices are supported? A: Any modern phone, tablet, or laptop with a camera and browser access. Q: Can I remove the watermark? A: The watermark is optional and can be toggled on or off at any time. Q: How do I record a video? A: Switch to video mode and Flower Wand Garden records up to 15 seconds with a timer and auto-stop. Summary and recommendations Flower Wand Garden turns a common phone feature — the camera — into a source of wonder. It is free, private, and fun for every age. Open the site, wave your finger, and grow a little wonder.

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Life Path Calculator

Life Path Calculator

Life Path Calculator - the fastest free numerology web app: instant results, no sign-up, and shareable reading cards.

Life Path Calculator 🎯 Key Takeaways (TL;DR) The Life Path Calculator is a free, no-sign-up web app that reveals your Life Path Number from your date of birth in seconds. The calculation engine is versioned pure code — deterministic, auditable, and never influenced by AI, so results are always repeatable. You receive a complete reading: number, strengths, challenges, life lesson, step-by-step math, a shareable PNG card, and a private result link. An optional AI reading (100 credits) adds personalized interpretation without ever changing the fixed number. Table of Contents Why This Life Path Calculator Stands Out The Calculation Engine Using the Tool in Three Steps The Free Reading in Detail AI Interpretation: Depth Without Distortion The Complete Numerology Toolkit Design and User Experience FAQ Final Thoughts Why This Life Path Calculator Stands Out There are dozens of Life Path Calculator websites, and most of them follow the same pattern: a slow page, a long form, an email gate, and a vague "your number is 7, you are wise" paragraph. The Life Path Calculator deliberately breaks that pattern. It opens directly on a clean form, calculates instantly, and gives you a genuinely complete reading with zero friction. What really separates this Life Path Calculator from the crowd is its commitment to verifiable results. The site states plainly that results come from "versioned pure code" — never from AI — and it displays the engine version right next to your number. In a niche filled with vague spiritual claims and random number generators dressed up as astrology, that transparency is refreshing. You can literally check the math on the page and trust that the engine is the same one that produced results yesterday and will produce tomorrow. The Calculation Engine The engine implements the standard Pythagorean reduction with full transparency: The month, day, and year are each reduced to single digits. The three digits are added together. The total is reduced again, unless it is 11, 22, or 33. For example, October 2, 1990 → 1 (10) + 2 + 1 (1990 → 1+9+9+0 = 19 → 1+9 = 10 → 1) = 4. The result is Life Path 4, The Builder. The Life Path Calculator displays every intermediate step, so nothing is hidden in a black box. This is a tool you can audit, which is rare in this space. Master Numbers are preserved rather than collapsed: 11, 22, and 33 are kept as themselves, framed as intensified versions of 2, 4, and 6. The site avoids the "you are special and evolved" cliché, which keeps the tone grounded and honest. Using the Tool in Three Steps Open the page. The form is immediately visible — no scrolling, no popups. Pick your birth date using the date picker. It works on desktop and mobile. Press "Calculate My Life Path." The result appears instantly, with the full calculation shown. That is the entire onboarding. No account creation, no email verification, no premium upsell blocking the result. This Life Path Calculator respects your time, and it works on any device with a browser. The Free Reading in Detail The free result is not a teaser. It includes: The Life Path Number itself, with its traditional name — The Pioneer (1), The Diplomat (2), The Creator (3), The Builder (4), The Explorer (5), The Nurturer (6), The Seeker (7), The Executive (8), The Humanitarian (9), The Intuitive (11), The Master Builder (22), or The Master Teacher (33). Natural strengths associated with the number. Potential challenges, written carefully as reflection prompts rather than verdicts. The site does not tell you what will happen to you; it offers questions worth reflecting on. A one-line life lesson, distilled and memorable. The step-by-step calculation, so you can follow along. A branded PNG card for sharing on social media or messaging apps. A private result link — public but unindexed, so sharing your reading does not leak your birth date into search results. Privacy is clearly a design priority: birth dates and private inputs are never exposed in indexed pages. AI Interpretation: Depth Without Distortion For users who want more, the optional AI reading costs 100 credits and covers core personality patterns, career direction, love and relationships, money and success tendencies, current inner conflict, and a personalized action plan with reflection questions and one low-risk next step. The crucial guarantee is separation of powers: the AI never touches the number itself. Your Life Path Number is computed by the fixed engine, and the AI only interprets that fixed result. If generation fails, credits are refunded automatically. You can think of the AI reading as a thoughtful friend commenting on a result you already verified — depth without distortion. The Complete Numerology Toolkit The same design philosophy powers a whole family of calculators on the site: | Calculator | What It Shows | |------------|---------------| | Compatibility | How two Life Path Numbers interact | | Personal Year | Yearly cycle from a date | | Full Numerology | Five core numbers in one report | | Soul Urge | Vowels of the name | | Expression | Full name derivation | | Birthday Number | Day of birth | | Lo Shu Grid | Chinese grid analysis | | AI Oracle | Fixed six-sign calculation | Each one shows its process and keeps fixed results free. If you enjoy your Life Path Calculator result, the site gives you a natural path to explore deeper. Design and User Experience The design is minimal, fast, and mobile-friendly. The page loads quickly, the form is a single field plus a button, and the result section is clearly laid out with the number, its name, and the supporting sections. The branded PNG card makes sharing pleasant instead of awkward. Nothing about this Life Path Calculator feels like a template spam site — it feels like a tool built by someone who actually uses numerology tools. FAQ Q: Do I need an account to use the Life Path Calculator? A: No. The calculator is completely free and requires no sign-up of any kind. Q: Why does the site show an engine version? A: Because the calculation is done by versioned pure code. Showing the version proves the result is deterministic and auditable — not a random or AI-generated number. Q: Does the AI reading change my number? A: Never. The AI only interprets the fixed number produced by the engine. Q: Is my birth date public? A: No. Private result links are unindexed, and the site does not expose birth dates in indexed pages. Final Thoughts The Life Path Calculator is the rare numerology tool that combines genuine speed, honest framing, and verifiable math. Whether you are a curious first-timer or a numerology regular, this Life Path Calculator gives you a complete, free reading in seconds and lets you share it beautifully. Try it once — the three-step flow takes less than a minute, and the reading is worth the detour.

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Scrap Mechanic

Scrap Mechanic

Scrap Mechanic - Guides, Builds, Wiki and 1.0 Help

Build, survive, and progress through Scrap Mechanic 1.0 with practical guides, current wiki entries, quests, builds, mods, updates, and tools.

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Copero

Copero

Play seven free browser football games: build careers, guess legends, create dream teams, and take on daily challenges.

Free football games, built for the browser Copero is a collection of seven interactive football games for fans who enjoy career simulations, football trivia, squad building, and quick daily challenges. Everything runs directly in the browser—there is nothing to download and no account is required. What you can play King of Cups:Create a footballer, draft attributes inspired by legendary players, choose clubs and transfers, win trophies, and guide a complete career from debut to retirement. Quick Career: Simulate an entire football career in under two minutes. Daily Career: Play the same seeded career challenge as everyone else each day. Guess the Footballer: Identify a legendary player using clues about country, position, era, and attributes. Which Football Star Are You?:** Answer a short personality quiz and discover your football archetype. Build Your Best XI:Assemble a balanced team of legends within a limited budget, then simulate its season. Higher or Lower: Compare football legends across pace, shooting, passing, dribbling, defending, and physicality. Why players use Copero Free to play with no registration or paywall Works on mobile, tablet, and desktop Available in Spanish, English, and Italian Progress and personal bests stay locally in the browser Fast sessions with replayable choices and shareable result cards Original editorial guides and footballer profiles for players who want to go deeper Copero is designed as a lightweight, privacy-friendly football playground: open the site, choose a game, and start playing immediately.

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Guildrun - Heroes, Builds, Wiki and Stra

Guildrun - Heroes, Builds, Wiki and Stra

Plan Guildrun runs with the local Demo 0.5.1 archive: compare heroes, inspect item and relic effects, read stage formati

Guildrun - Heroes, Builds, Wiki and Strategy Guide Plan Guildrun runs with the local Demo 0.5.1 archive: compare heroes, inspect item and relic effects, read stage formations, and turn each loss into a clearer next decision. This Guildrun guide and wiki covers the Demo 0.5.1 dataset. It helps players move from the opening draft to a stable formation by combining practical handbooks with searchable records for heroes, items, relics, enemies, stages, and events. Strategy pages emphasize decision frameworks—role coverage, targeting, economy, and rank order—rather than fixed tier lists. Database pages keep exact values, effects, and route connections so you can compare a shop offer or failed fight with the current Demo record. Start with the beginner guide, then the strategy guide, or open the player handbook. Compare the full hero roster, then use the Wiki and World directories when you need a specific record. Use site search to jump straight to a name, or visit the release status page for current availability and development plans.

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Karpo — proactive AI assistant

Karpo — proactive AI assistant

Karpo — a proactive AI assistant that lives in iMessage4

Karpo is a proactive AI assistant that brings personalized city recommendations directly to iMessage. Tell Karpo what you feel like doing, from finding a dinner spot or local event to planning a date night, group hangout, weekend, or trip. It learns from what you love and skip, making every suggestion more relevant over time. Karpo can uncover hidden gems, suggest experiences, coordinate plans in group chats, provide booking links, and help with everyday life admin. Free to start and especially knowledgeable about New York City, San Francisco, and London, Karpo easily turns vague ideas into plans worth leaving home for.

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