
Chemistry AI – Free Chemistry Solver Online (Step-by-Step)
Solve chemistry problems and balance equations interactively with AI-powered step-by-step guidance, no signup required.
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Solve chemistry problems and balance equations interactively with AI-powered step-by-step guidance, no signup required.

Write, execute, and learn code in Python, Java, JavaScript, C++, Go, and Rust.
@francis7_a · X
Building - learning tools for devs and student. happy to connect.

Use interactive calculators for Pathologic 3 diagnosis, metabolism, barter, crafting, and time-travel mechanics.
Pathologic Calculator — Stream 游戏 Pathologic 3 工具网站

A calculator and data manager for LORT game statistics and analysis.
LORT Calculator — Stream 游戏 LORT 工具网站

Explore animated decay chains, emissions, and clinical applications of medical radionuclides.
@NazimCoskun · X
Radionuclide Explorer: This is an interactive resource for learning about common radionuclides used in nuclear medicine. It emerged out of curiosity: How far could an AI coding agent get with a real reference site in a single session? The whole thing including the layout, dataset and decay animations, was built in roughly one hour entirely by Claude Code, with only a few minor improvements.

Solve math problems and collaborate with peers using AI assistance.
lemma1729 · HN
Hi HN, This is ProofTree, and in TLDR: it is a platform where you can chat with an AI to do math, the way you already do, with context-awareness and knows how you personally do math, connected to the fora of other live human mathematicians. So, when you are talking to an AI about a proof at 3 am, and you need a human expert looking at it, or a discussion around it, like you do on StackExchange, this is it! You need an approved email account to use it, so please write here if you would live to try it out.

Design cellular automata patterns, animate them, and export as SVG.
@majo_puterka · X
Nerdy, browser-based pattern generator on Wolfram's cellular automata. SVG export, freehand mode, free.

Calculates concrete needed for slabs, footings, driveways, and small construction projects in cubic yards, bags, or cubic meters.
taylormichellebf · V2EX
做了一个免费的 Concrete Calculator,帮 DIY 用户估算混凝土用量 最近做了一个英文站:The Concrete Calculator 地址: https://the-concrete-calculator.com 它主要解决一个很具体的问题:用户在做 patio 、shed base 、walkway 、slab 这类小型混凝土项目时,不知道该 买多少混凝土、多少袋,或者该订多少 cubic yards 。 目前支持: - Concrete Slab Calculator - Concrete Pad Calculator - Concrete Yard Calculator - Concrete Bag Calculator - waste factor - cubic yards / cubic feet / cubic meters - 简单材料成本估算 做这个站的原因是我发现很多英文混凝土计算器要么广告太重,要么结果不够直观。这个版本尽量把核心计算和 单

Match spreadsheet columns using custom conditions and AI-powered precision.
Smart Match AI — 自定义条件和精度来匹配两列不同的数据,更加自由的 Excel lookup/vlookup

Don't let your LLM guess the math. Ultimath evaluates every expression with five independent numeric engines in parallel — REST API + MCP for Claude.
@UtevR57878 · X
Not vibe-coded, rather AI assisted dev:

Calculator for Obsessed Trace game data and calculations
Obsessed Trace Calculator — Stream 游戏 Obsessed Trace 工具网站

Practice algorithm interview problems with solutions and interactive visualizers.
@Galliard232634 · X
Come study with me on