Visual Fraction Adder – Online Slice & Combine Pies
Drag pie slices to represent fractions and see them added together. Great for visual learners.
UD5 Toolkit
Digitally track your fund goals – one jar at a time
Create your first jar and start tracking your savings goals.
Drag pie slices to represent fractions and see them added together. Great for visual learners.
Log leftovers with date stored and set visual alerts when they need to be eaten. Reduce food waste. Local storage.
Track daily mood with emoji selection and optional notes. See weekly/monthly mood trends in a color-coded chart. All data stored privately in localStorage.
Log daily sleep to see cumulative sleep debt or surplus over weeks. Visualizes chronic sleep loss trends. Stores data locally in your browser only.
Add rows and columns, merge cells, and set gaps visually. Get the grid‑template CSS and HTML. Fast layout prototyping.
Connect oscillators, gain nodes, and filters with a visual graph. Hear the result in real time. Learn Web Audio interactively.
Create a random, aspirational quarterly objective with unrealistic key results. For meeting icebreakers.
Enter text and see each character's 8‑bit binary laid out in a black‑and‑white grid. Beautiful data art. Local.
Keep track of a tennis match: points, games, sets, and deuce. Supports tiebreak. Great for friendly matches. Local.
Keep a simple list of movies you want to watch. Add notes and check them off. Purely local storage.
Tap a glass icon each time you drink a cup of water. See your daily intake. Reminders optional. Local storage.
Create colorful digital sticky notes on a corkboard. Drag, edit, and delete. Notes persist in local storage. No login.
Build a simple decision tree by adding yes/no nodes. Flowchart style. Export as text outline.
Enter a number and see its Collatz sequence graphed. Watch the steps until it reaches 1. Mesmerizing math.
Press any key and see it light up on a standard QWERTY layout. Check functionality or demonstrate shortcuts.
Set a cron expression and see a calendar of the next 1,000 execution times. Never miss a schedule again.
Log neck, chest, waist, hip, and limb measurements over time. See changes on a chart. All data stored locally.
An animated hourglass that you can set for any time. Watch the sand flow. Beautiful and calming timer.
See the International Space Station’s current position on a world map in real time. Uses public API. No refresh.
Step‑by‑step virtual frog dissection with labeled organs. No mess, ethical. Great for remote learning.
View pre‑loaded virtual microscope slides of onion cells, leaf epidermis, etc. Zoom and pan like a real microscope.
Track your subscriptions, calculate monthly and yearly totals, and find savings by pausing unused services. Local data.
Create simple 2‑ or 3‑set Venn diagrams by entering comma‑separated lists. Shareable via URL fragment. No account.
Add plants and track when you last watered them. Get a simple visual alert when it's time to water. Local storage.
View recent earthquakes worldwide on a map. Fetches public USGS GeoJSON feed directly from browser. Real-time data.
Log your coin collection with year, mint, and grade. Filter and sort. Data stored in localStorage. For numismatists.
Log your assets and liabilities to calculate your net worth over time. Data saved only in your browser for security. Simple and clutter-free.
Press keys on your physical keyboard and see them highlighted on a virtual keyboard. Detects multi-key rollover. Quick hardware check.
Quickly find the final price after a percentage discount. Also works in reverse to find the original price. Handy for budget shoppers.
Build good habits by tracking daily completions. Visualize streaks and progress. Pure browser storage keeps your habit data private and offline-capable.