Directory
Published directory entries matching your search.
Converter NOW: Unit Converter is an open source Android application for converting units and currencies. It offers real-time conversion with all other units as the user types, customizable unit ordering, and an integrated calculator. It supports 200+ units of measurement and 30+ currencies, with currency exchange rates updated daily.
An online generator that writes dating profiles from a few quick answers and user-supplied keywords, intended to help fill the free text field on online dating sites. The site also offers an opening message generator, an excuse generator and a love calculator, and forms part of the Masterpiece Generator set of text tools.
dCode is a collection of over 900 online tools for solving games, riddles, ciphers, mathematics and puzzles. It offers word game solvers, a cipher identifier recognizing more than 200 ciphers, and tools for codes, alphabets, calculators and algorithms. The site states that it is free.
Desmos Studio develops free digital math tools, including Graphing, Scientific, Geometry, and 3D Calculators, as well as Notebook. The tools are available for exploration, with examples provided for user inspiration.
Display Calc is a calculator that checks whether a display is retina, finds the distance at which it becomes retina, and computes screen dimensions and PPI. It accepts an aspect ratio preset or custom ratio, a resolution, and any one physical dimension, updating the others automatically. The result can be used to set Photoshop to accurate print size.
dLine is a command-line calendar tool that brings a calendar directly to the terminal. It can track important dates, add events using APIs, calculate timespans and manage multiple calendars. It offers a dynamic monthly view, a static monthly calendar, a workday calculator and administration of calendar datasets, and asks for a region on first launch to fetch relevant holidays.
donjon is a collection of random generators for Dungeons & Dragons and other tabletop role-playing games. Generators cover fantasy names, world maps, weather, quests, NPCs, loot, castles, towns, calendars, dungeons, inns and treasure maps, with sections for AD&D, d20/Fantasy, Microlite20, Pathfinder and D&D 4e. It also includes an initiative tracker and calculators.
dut is a disk usage calculator for Linux. It produces an ASCII-art disk usage tree, counts hard links accurately, has a configurable output format, and allows setting the maximum depth of files shown via a command-line argument.
Eat This Much is a meal planning tool that creates personalized meal plans based on food preferences, budget and schedule. The site offers a calorie calculator, weekly meal plans and automatic grocery lists. Users can follow eating styles or create their own and add owned foods to a virtual pantry.
eCalc provides simulation tools for electric drives, including calculators for airplane propellers, multirotors, helicopters, EDF jets, and electric cars. The site lists a motor database and a restricted free demo version with reduced functionality and partial database access. It has been presented as offering reliable predictions since 2004.
Engaging Data is a virtual workshop and gallery of JavaScript tools, data visualizations, calculators and maps on topics including maps, environment, energy, finance, politics, health and math. A post covers how mask wearing and effectiveness can reduce the coronavirus transmission rate R0; that visualization does not account for vaccines, which the source calls a limitation.
ExRx.net is a website offering exercise reference articles, exercise libraries, and fitness calculators for exercise professionals, coaches, and fitness enthusiasts. It began in 1999 and includes a searchable exercise library and fitness testing resources. A subscription service with premium content launched in 2022, and a mobile app called Workout Tools was released.
Extreme Weather Watch is a site founded in 2021 that provides an interface for viewing historical weather records. It offers climate records by U.S. state, Canadian province, Australian state and other countries, plus country and city comparisons and temperature conversion calculators.
GamingSmart is a free tool site offering a mouse sensitivity converter and eDPI calculator. It converts sensitivity between games using the 360° distance method and states support across 100+ games. No signup is required.
Genshin Center is a companion website for Genshin Impact. It offers an Achievement Tracker, Ascension Planner, damage calculator and a link to the HoYoLAB Teyvat Interactive Map. The site has been live since late October 2020 and is described as still in active development.
GeoGebra is an interactive mathematics platform for teaching and learning. It provides free digital tools including calculators, graphing, geometry, 3D exploration, and collaborative whiteboard features. The platform offers ready-made educational resources for grades 4 to 12, tools for users to create custom materials, and classroom functionality for teachers to track student progress and provide feedback. It integrates with various learning management systems and is used by teachers and students at school and university levels.
GradesCalculator is an online tool that calculates cumulative grade point average (CGPA) for students using the CGPA system. Users enter each semester's GPA and corresponding credit values to compute their overall CGPA. The site also provides access to related grade calculators and a paid professional CV building service for interns.
Grim Dawn Tools is a collection of tools for the action role-playing game Grim Dawn. The site lists a build calculator, world map, checklist, item database, monster database, and pet database, plus sections for modifications including Reign of Terror, Diablo 3 Classes, and GD League Season 7. It states it is not affiliated with Crate Entertainment.
HandyAI is a collection of free browser-based tools for AI and Claude developers, including token counters, prompt analyzers, JSON to tool-use converters and cost calculators. It requires no sign-up and lists the LLM Token Counter and AI Cost Calculator as live tools, with others announced for later release.
Helium is a free, color-coded online student planner and academic calendar app available via web, iOS and Android. It lets users track classes, homework, grades and notes in a single interface, includes a built-in grade calculator, progress pace tracking, at-risk class alerts, and supports two-way sync with external calendar services.
Heynote is a dedicated scratchpad for developers that functions as a large persistent text buffer divided into blocks. Each block can have its own language mode for syntax highlighting and auto-formatting, and math blocks serve as calculator scratchpads. Multiple note buffers can be created and organized into directories, and inline images can be pasted, resized, and annotated. It is available for Mac, Windows, and Linux.
Reading-time calculator for estimating how long a book or text will take to read.
The HP Computer Museum is a collection of HP computing products introduced between 1966 and 1991. It covers calculators, desktop computers, computer systems, tape and disc drives, plotters, printers, digitizers and other hardware, plus software, documentation and promotional materials. The site states it is not affiliated with HP Inc. or Hewlett Packard Enterprise.
Ian Coleman's personal index page linking to tools including a BIP39 mnemonic code converter, an entropy bias calculator, a multisig tool, a Bitcoin key compression tool, Shamir secret sharing and Shamir39 tools, a BLS threshold crypto tool and an EIP2333 BLS12-381 key generator. It also hosts a CIA World Factbook API and statements on donations and a public key.
