col72 — Punch Card Simulator

Super retro game!

Just a circuit simulator. You can make calculators, games, anything.

Interactive Magic Using Binary Number System

筆算の手順を教えてくれる算数教材

That "flip-flop" is revived on the Web! A real Solari-style information display machine simulator packed with romance and gimmicks that lets you traverse railway lines across the country with just one finger. Which is your favorite route?

シンプルに作ったデータ検索サイト

This is a C language execution environment that operates completely offline. While there are many functional limitations, most programs found in introductory textbooks can be executed. Programming learning is possible even on iPad.

ブラウザの端末内でファイルを変換するサイト

自分の実力に合わせてフラッシュ暗算が出来ますよ！

とろんぼーん！！！！！(擬き)

スマホでもパソコンでも使えます。

You can easily generate ASCII art characters using symbols on a browser. We have prepared 4 types of ASCII fonts. All fonts are original creations.

Fly through the neon horizon.

Diagnose your sense of humor based on actual research and papers!

Let's create and run Python code with a Scratch-like feel!

年商を スケーラブルなトランザクションで 圧倒的に。

It is a web application that allows you to learn system English vocabulary from a personal computer or smartphone.

開発者にしか需要無！改行コード表示するHTML

This is a web app that automatically generates natural and emotional quotes by combining word and grammar data. You can enjoy meeting different words each time with just a button press.

It is a website where you can freely choose fonts and create PNG images of your favorite characters with outlines and shadows.

FormatArc is a lightweight site that processes JSON formatting, YAML conversion, and CSV conversion only within the browser. Input data is not sent to the server, and formatting and conversion can be completed on the spot.

This is an app that converts line drawings into a form that can be output as pure mathematical formulas, Javascript, or GeoGebra. I happened to see the concept of Fourier series transformation on YouTube Shorts and impulsively created this. There was one problem that kept causing short circuits that I couldn't eliminate, but I gave up on that in order to make it work as a web app. Since it comes with epicycle animation, you can kill some time just watching it. It can convert even drawings made with the Paint tool that comes standard on Windows to a certain degree, so please try playing with it.

🥁 Tap and Get Happy! A Godly Drum Machine That Sessions with Your Favorite Songs! A super stylish web app where you can enjoy authentic drum performances just by tapping your PC keyboard (A, S, D, F)!