Everything in the catalog

A simple, self-hostable budgeting app built with React, TypeScript, and Supabase.

Your life as an RPG.

Converts a date and time between several time zones at once.

Collection of web developer tools such as an aspect ratio calculator, color picker and formatter.

Privacy-focused set of browser-based tools for PDFs, images, text, calculators and more.

Loads a 3D model and generates the model-viewer web component snippet and AR settings.

TypeScript music theory, pitch constellation diagram, and guitar chord calculator

深度房贷计算器：LPR 利率变动、提前还款策略对比与贷款决策模拟，纯前端零依赖

'Mortgage Expense Calculator' will help you to calculate the estimated mortgage expenses for buying a property in the Netherlands.

get ideas and recipes on what you want to cook and how to cook

Collection of ONNX models, such as image classifiers and detectors, that run in the page through ONNX Runtime Web.

Converts EasyEDA or LCSC components to KiCad format with symbol and footprint preview.

Small React app that computes loan EMI and monthly interest.

Habit tracker PWA that works offline and needs no login.

Works out your VDOT fitness score from a race result and the training paces that go with it.

Free open-source Skylight alternative — family command center for wall tablets.

Calculates RC low-pass cutoff and draws Bode magnitude and phase plots, with an audio demo.

开源 AI 路书生成工具 · Cursor/Claude Agent Skill：简版行程表 → tripData.json → 可交付 HTML/PDF。小红书配图、LLM 润色、飞猪酒店数据。Open-source AI travel roadbook generator for custom tour…

Ad-free converter for fiat currencies and cryptocurrencies that works offline as a PWA.

Divides rent among roommates fairly using each person's income and room.

Financial independence planner showing when savings can fund your spending.

Open-source compound interest calculator with a growth chart.

Computes Dutch mortgage loans (Dutch interface).

Dutch mortgage tool: monthly payments, extra repayments and buy-versus-rent analysis.