
Bulls and Cows — Number Guessing Game
Guess the secret four-digit number in this classic logic puzzle game.
@Olys1703 · X
🚀 Just released a new version of Bulls and Cows! The game now supports Dark Mode 🌙
The full gallery
Tech stack
11 projects

Guess the secret four-digit number in this classic logic puzzle game.
@Olys1703 · X
🚀 Just released a new version of Bulls and Cows! The game now supports Dark Mode 🌙

Free, fast, and privacy-first online utilities. Growing suite of browser-native calculators, converters, and web tools with zero server tracking.
@twistertools · X
Free, fast, and privacy-first web utilities & converters. Thank you!

Learn math and physics through cinematic missions and interactive physics simulations.
@electricdrago10 · X

Free browser game Bulls and Cows — a classic number-guessing logic puzzle. Guess the secret four-digit number in as few attempts as possible.
@Olys1703 · X
Finally, Bulls and Cows has moved to its very own domain 🚀🚀🚀

Personalized math learning platform that watches kids solve problems and shows parents evidence of growth.
@DavidEstrine · X

Interactive lessons in math, programming, data analysis, AI, and science.
@BruceWayne95290 · X
just leaving a comment cause its 1am and im vibe coding, will come back tomorrow (on an alt account for open claw fyi) I've worked with the following brands: vytadose, bajabeachco, jaje health, eric javits, 4knines, welleco, coatdefence

Play a Minesweeper-style puzzle game where you uncover hidden dragons using strategy.
dragonsweeper — 创新型的扫雷游戏,融合了经典FC时代日式角色扮演和现代即时游戏元素

Free collection of 48 online calculators for finance, health, math, and everyday needs.
@avinashraj61815 · X
i vibe coded this week

Free calculators for DIY home projects like woodworking, decks, concrete, and drywall.
u/CaboWabo55 · Reddit
Built a DIY calculator site in a weekend — betting on "boring tools" over content After my last project (an AI debate platform) got rejected by AdSense for "low value content," I went the opposite direction: no content treadmill, no AI features, no backend. Just genuinely useful calculators. studandslab.com — 10 free calculators for woodworking and home projects (board feet, stair stringers, concrete, drywall). Everything runs client-side, so hosting is free and every visitor costs me $0.

Input a math problem to get AI-generated visual explanations for learning.
@laodaozzz · X
我也做了一个教小朋友学数学的工具叫easymath。

Inspect and remove hidden Unicode artifacts in AI-generated text without altering visible content.
u/nategdd · Reddit
I published reproducible fixtures for a lossless AI text artifact scanner I built AI Text Watermark Remover to inspect copied AI text without rewriting visible words. It reports exact hidden Unicode code points, removes only supported literal artifacts locally, and does not claim that hidden characters prove AI authorship. I just published the browser compatibility fixtures, artifact coverage benchmark, self-hosted API, Docker image, and open-source scanner so the claims can be tested inste