Dev tools · alternatives · 2026
24 alternatives to Test your shape rotation skills
Hi all, hope someone enjoys (or not) my weekend project. See how many matching pairs you can find in two minutes. This is written in C++ and built to WebAssembly with Emscripten. The code is at https://github.com/0xf00ff00f/rotator
Test your shape rotation skills is a browser-based game where players find matching pairs of rotated shapes within a two-minute time limit. Built in C++ and compiled to WebAssembly using Emscripten, it challenges users… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Prices are shown for the 1 we have checked on their own sites, 1 of them free or with a free tier. Test your shape rotation skills launched in 2022; newer entries below may have overtaken it.
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I had the concept in my head for some time and firstly just prototyped it using only HTML & CSS. Sent it to a few friends and they liked it so I made it into its own website and added few 'competitive' features like click counter and share button.
2022 · rotaboxes.com · its alternatives →
- 2
Hey, maker here. After launching a daily word search game, I randomly thought of this math game while driving. Finally got around to making it and I think it turned out pretty cool. It’s a math search game that’s meant to help you practice your quick addition, subtraction, multiplication, and division skills. I’m hoping it’ll help people (even those like me who aren’t big on math) learn and increase their speeds. (There are also some settings you can enable to make the game harder) If you try it out, please let me know if you found it fun, if you have anything you’d like me to add, or if you…
2024 · worchle.com · its alternatives →
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Shape 2▲5405000+ fully customizable assets for your web design projects
2020 · shape.so · its alternatives →
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Shape Divider▲346Create fully responsive shape dividers for your next project
2020 · shapedivider.app · its alternatives →
- 6FP
Hello HN users, This is a CAD by code project I have been working on on my free time for more than year now. I built it with 3 goals in mind: - It should be familiar to CAD designers who have used other programs. Same workflow, same terminology. - Reduce the mental effort required to create models as much as possible. This is achieved by: - Provide live rendering and visual guidance as you type. - Allow the user to reference existing edges/faces on the scene instead of having to calculate everything. - Provide interactive mouse helpers for features that are hard to write by code: Only 3…
Apr 2026 · fluidcad.io · its alternatives →
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Hi HN, I'm Narek. I built Manim-Web, a TypeScript/JavaScript port of 3Blue1Brown’s popular Manim math animation engine. The Problem: Like many here, I love Manim's visual style. But setting it up locally is notoriously painful - it requires Python, FFmpeg, Cairo, and a full LaTeX distribution. It creates a massive barrier to entry, especially for students or people who just want to quickly visualize a concept. The Solution: I wanted to make it zero-setup, so I ported the engine to TypeScript. Manim-Web runs entirely client-side in the browser. No Python, no servers, no install. It runs…
Feb 2026 · github.com · its alternatives →
- 8IW
I’ve been working on a puzzle game for a few years as a side project. The game is based on a small region of tiles in a grid that is mirrored, modified, and mirrored again. It’s based on a novel phenomenon I noticed where, once these mutations happen a few times, the original region can be hard to recognize. You have a feeling there are symmetries in the image, but they are just out of grasp. Going further, if only part of the region is visible, such as mirroring off the edge of the board, it adds to the feeling and it becomes a satisfying puzzle to solve. I originally published this on the…
2024 · hidden-mirrors.com · its alternatives →
- 9
Hi HN, I built TetrisBench, a benchmark that tests LLMs on real-time code generation and reasoning through Tetris. Live: https://tetrisbench.com/ *How it works:* Each model starts with an initial optimization function for evaluating Tetris moves. As the game progresses, the model sees the current board state and updates its algorithm—adapting its strategy based on how the game is evolving. The model continuously refines its optimizer: - Board getting too high? Prioritize clearing lines. - Hole forming? Adjust penalties. - Safe stack? Build for a Tetris. The model generates…
Jan 2026 · tetrisbench.com · its alternatives →
- 10
GitGuessr▲98I built this game as a playful way to train code reading skills. You're dropped into a random location in a real GitHub repo where some lines code are hidden. The goal is to pick up clues from the surrounding code and fill in the missing lines as quickly as possible. It currently has curated game content for Python, TypeScript, JavaScript (by most metrics the top 3 languages on GitHub). I had the idea when it dawned on me that reviewing and understanding code spat out by an LLM is a key skill for the AI era. (I sincerely hope you're critically reviewing what your favorite LLM is serving…
Feb 2026 · gitguessr.com · its alternatives →
- 11RV
While studying Geometric Algebra I have built some interactive visualization to demonstrate how geometric transformations (rotation, scaling, translation) can be constructed by just composing reflections. Accepting reflection as the most elementary geometric operation was an eye opening moment for me. I think some of you might enjoy the interactive visuals.
Aug 2026 · static.laszlokorte.de · its alternatives →
- 12
Ecocoru is a puzzle game where you have to solve compass and ruler construction problems. The game mimics compass and ruler and let you draw straight lines/segments and circles/arcs. You can also view and explore a solution for each problem. A basic knowledge of well-known results of Euclidean geometry is needed to play the game. The game has over 70 problems.The game is designed for full-screen mode and the use of the mouse.
2022 · sdkgames.itch.io · its alternatives →
- 13AR
2015 · xqt2.com · its alternatives →
- 14
MeshEdit▲61Model, rig and animate game assets in your browser
Sep 2026 · meshedit.xyz · its alternatives →
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Hi HN! I'm Matt, founder of Frontend Mentor (https://www.frontendmentor.io). We provide front-end and full-stack coding challenges with professional Figma designs, enabling developers to build real projects and grow their skills. The problem: AI coding tools are great, but they can work against you when you're learning. Ask Copilot or Cursor to help with a beginner project, and they'll happily write the whole thing for you. You ship the project, but you didn't really learn anything. What we did: We added AGENTS.md (and CLAUDE.md) files to every challenge's starter code. These files…
2018 · frontendmentor.io · its alternatives →
- 17AM
Hi everyone! I'm one of the developers behind this project. I wrote it with my two brothers, Daniel and Ricardo. For years the three of us have been curious about how multiplayer games work, which is why we decided to work on this project. Our goal was to gain a deep understanding of how different players can share the same 3D space, which is why we wrote our own tiny game engine instead of using something like Unity. We wrote the engine using C++ and OpenGL, and we then compiled it to WebAssembly using Emscripten so that it would run effortlessly on web browsers. We are really excited about…
2022 · play.moonlightmuseum.io · its alternatives →
- 18
Hey HN, I built this simple puzzle generator to play around with wasm a bit. It's open source if anyone wants to play around with the code https://github.com/lnenad/puzzlip
2024 · puzzlip.com · its alternatives →
- 19
I built this out of frustration as I lead the development of AI features at Yola.com. Prompt testing should be simple and straightforward. All I wanted was a simple way to test prompts with variables and jinja2 templates across different models, ideally somthing I could open during a call, run few tests, and share results with my team. But every tool I tried hit me with a clunky UI, required login and API keys, or forced a lengthy setup process. And that's not all. Then came the pricing. The last quote I got for one of the tools on the market was $6,000/year for a team of 16 people in a…
2025 · langfa.st · its alternatives →
- 20
I built a browser-based port of fogleman/primitive — a Go CLI tool that approximates images using primitive shapes (triangles, ellipses, beziers, etc.) via a hill-climbing algorithm. The original tool requires building from source and running from the terminal, which isn't exactly accessible. I compiled the core logic to WebAssembly so anyone can drop an image and watch it get reconstructed shape by shape, entirely client-side with no server involved. Demo: https://primitive-playground.taiseiue.jp/ Source:…
Mar 2026 · github.com · its alternatives →
- 21AR
I think it's finally time to lock version 0.2 of my 4d side project. (Since previous Show HN a couple of years ago: https://news.ycombinator.com/item?id=37100760 I scrapped lots of stuff and concentrated on making a javascript "game engine") The sole purpose of this project is to explore whether it's possible to make the human brain spatially aware of four dimensions using Virtual Reality. It’s my first ever game project, my first time using Unity, first time writing C#, and my first anything with WebXR, so please be gentle! To manage expectations, it isn't visually pleasing…
2025 · brainpaingames.com · its alternatives →
- 22CA
Hello everyone, We just launched a side-project we have been building over the last couple of months -- Coderoulette is a pair programming game for developers, like a Chatroulette for hackers. We match developers in real time and give them coding challenges they have to solve doing pair programming using a collaborative IDE and video conference. You can check it out here: https://www.coderoulette.com/ We also published an article explaining how we built it. I'd love to hear your feedback.…
2016 · its alternatives →
- 23AF
2016 · matchthestack.com · its alternatives →
- 24ID
2024 · nest2d.online · its alternatives →
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