Meeting Cost Calculator
Estimates the real dollar cost of a meeting based on attendees and duration.
Open tool ↗
The Simple SeriesSimple ToolsSmall tools. Clear purpose.
What would you like to do?
Calculate, create, learn, or play. Open a tool directly, or save a few favorites for next time.
Sinking Fund Planner
Plans savings toward a future big purchase.
Open tool ↗
Side Gig Profit Calculator
Calculates true hourly profit after expenses.
Open tool ↗
Subscription Cost X-Ray
Breaks down subscription costs annually and by category.
Open tool ↗
Debt Snowball vs Avalanche Simulator
Compares two debt payoff strategies.
Open tool ↗
Unit Price Comparator
Finds the better deal between differently-sized products.
Open tool ↗
Tip & Bill Splitter Pro
Splits a bill with tip and tax across multiple people.
Open tool ↗
Car Ownership True-Cost Calculator
Estimates the full real cost of owning a car.
Open tool ↗
Simple Calculator
Bare-bones four-function calculator with memory.
Open tool ↗
Unit Converter
Converts length, weight/mass, volume, and temperature.
Open tool ↗
BMI Calculator
Metric/imperial BMI with WHO/CDC categories (not medical advice).
Open tool ↗
Percentage Calculator
Three modes: X% of Y, X is what % of Y, and % change.
Open tool ↗
Password & Passphrase Generator
Generates secure passwords or memorable passphrases.
Open tool ↗
Decision Wheel
Randomly picks from a weighted list of options.
Open tool ↗
Habit Streak Tracker
Tracks daily habit streaks.
Open tool ↗
Event Countdown Timer
Counts down to any future date/event.
Open tool ↗
Interval/Pomodoro Timer
Timer for focused work/rest intervals.
Open tool ↗
Text Toolbox
Common text transformations (case, count, etc).
Open tool ↗
Icebreaker Generator
Random conversation-starter questions.
Open tool ↗
Flashcard Study App
Create and study flashcard decks.
Open tool ↗
Age Calculator
Calendar-aware years/months/days plus next-birthday countdown.
Open tool ↗
Stopwatch with Laps
Real Date.now()-delta timing with lap recording.
Open tool ↗
Knowledge Quiz Maker & Taker
Build and take custom quizzes.
Open tool ↗
Trivia Night Generator
Generates trivia rounds by category.
Open tool ↗
Color Picker & Contrast Checker
Checks WCAG color contrast ratios.
Open tool ↗
Fake Movie Title/Band Name Generator
Generates silly fake titles/names.
Open tool ↗
Snake
Classic arcade snake game.
Open tool ↗
JSON Formatter & Validator
Formats and validates JSON.
Open tool ↗
Regex Tester
Tests regular expressions against sample text.
Open tool ↗
Typing Speed Test
Measures typing speed and accuracy.
Open tool ↗
"Which One Are You?" Quiz Engine
Reusable config-driven personality quiz engine.
Open tool ↗
Which Celebrity Are You
Personality-match quiz against 8 curated public figures.
Open tool ↗
Which Decade Are You
Personality-match quiz against decades.
Open tool ↗
Which Love Language Are You
Love language personality quiz.
Open tool ↗
Spirit Animal Quiz
Personality-match quiz against animals.
Open tool ↗
IQ-Style Brain Test
Logic/pattern puzzle test (not a real IQ score).
Open tool ↗
EQ Style Quiz
Emotional-intelligence style self-assessment.
Open tool ↗
Memory Sequence Game
Simon-says style memory game.
Open tool ↗
Family Tree Builder
Build and visualize a family tree.
Open tool ↗
Caregiving Task & Medication Tracker
Tracks meds and tasks for care recipients.
Open tool ↗
Social Security Claiming Age Estimator
Estimates SS benefit at different claiming ages.
Open tool ↗
Garden Planting Calendar
Frost-date-based planting schedule.
Open tool ↗
On This Day in History
Shows historical events for any date.
Open tool ↗
Health Metric Tracker
Logs blood pressure, weight, and blood sugar trends.
Open tool ↗
Road Trip Itinerary Planner
Plans multi-stop road trips by day.
Open tool ↗
Solitaire (Klondike)
Classic card game.
Open tool ↗
Excuse Generator
Generates absurd excuses by tier.
Open tool ↗
Passive-Aggressive Note Generator
Generates notes for shared spaces.
Open tool ↗
Corporate Buzzword Bingo
Bingo card of corporate jargon.
Open tool ↗
Chaos Coin Flip
Weighted random decision maker.
Open tool ↗
Micro-Nation Founding Kit
Found your own absurd micronation.
Open tool ↗
Logical Fallacy Reference + Spotter
Glossary and heuristic fallacy detector.
Open tool ↗
Bayes' Theorem Calculator
Plain-language Bayesian updating calculator.
Open tool ↗
Monty Hall & Statistical Paradox Simulator
Interactive Monty Hall and birthday paradox sims.
Open tool ↗
Formal Logic Truth Table Builder
Builds truth tables from logic expressions.
Open tool ↗
Fermi Estimation Trainer
Practice order-of-magnitude estimation.
Open tool ↗
Conway's Game of Life
Canvas-rendered cellular automaton, classic four rules.
Open tool ↗
Dijkstra's Shortest Path Visualizer
Build a weighted graph and trace the shortest-path algorithm step by step.
Open tool ↗
Linear Regression Calculator
Least-squares regression from scratch, with R².
Open tool ↗
Monte Carlo Pi Estimator
Estimates π via random sampling in a unit square.
Open tool ↗
Cipher Toolkit
Caesar and Vigenère ciphers, plus frequency-analysis breaking.
Open tool ↗
Elo Rating Calculator
Single-match and roster-based Elo rating computation.
Open tool ↗
Life in Weeks
Perspective visualization of time in weeks.
Open tool ↗
Ikigai Finder
Guided purpose-finding exercise.
Open tool ↗
Decision Journal
Log decisions and track prediction calibration.
Open tool ↗
Stoic Daily Reflection
Morning/evening Stoic-inspired journaling prompts.
Open tool ↗
Life Satisfaction Wheel
Visualizes satisfaction across life categories.
Open tool ↗
Dad Joke Generator
Random original dad jokes.
Open tool ↗
Roast Me Generator
Lighthearted safe roasts by category.
Open tool ↗
Pun Generator
Topic-based pun generator.
Open tool ↗
Two-Line Joke Generator
Classic setup/punchline jokes.
Open tool ↗
Absurd Superhero Generator
Generates a silly superhero with powers and weaknesses.
Open tool ↗
Absurdist Trolley Problem Generator
Comedic impossible trolley-problem scenarios.
Open tool ↗
Cosmic Excuse Generator
Excuses framed via real cosmic-scale facts.
Open tool ↗
Serious Answer to Silly Questions
Real science answers to silly-sounding questions.
Open tool ↗
Silly Answer to Serious Questions
Whimsical non-answers to big questions.
Open tool ↗Nothing here yet.
Try another category or search. Save tools using the Save button to keep them in this browser.
Saved items stay in this browser. This preview includes the tools available in the current website collection.