StepWise
100+ data structures and algorithms, every step narrated with its pseudocode line and variables; step back, share as a link, embed in Canvas.
Apps
Every app HintWise has built, all live. Open one and try it, or ask for one like it.
Poincaré Paint
Draw in the hyperbolic disk and watch every stroke tile to infinity.
Digital Student Assistant
An AI teaching assistant that asks before it tells and won’t hand over homework. Yusuf Pisan’s data structures students at UW Bothell use it now.
Bombe Bench
Step through an Enigma rotor by rotor, then break it with a working Bombe.
Cache Miss Theater
Watch a C loop nest's exact address trace run through a configurable cache.
Health Page Tracker Watch
For therapists, clinics, med spas and wellness studios: every outside tool on your booking, intake and service pages, what it receives, whether its maker signs a BAA, and what is new since last month.
US Duty Price Sheet
For UK makers who post to US customers duty paid: a US code for every product, a US price and postage table with the duty included, and a list of which prices to change when US duty changes.
Donation Receipts
For small charities, churches and community groups: numbered donation receipts with your ABN and the right tax wording, and one 30 June statement per donor, straight from your Xero or bank export.
Popup Check
A free bookmark that tests your email popup, age gate, cookie banner and chat button with the keyboard and a screen-reader view, and keeps a dated report with a message for the app’s support.
Accessibility Fleet Log
For agencies looking after many client sites: everyone's accessibility status on one screen, a dated log of problems found and fixed, a statement per site and a monthly report under your name.
Misrepresentation Preflight
Suspended by Google Shopping for “Misrepresentation”? See every place your store contradicts itself (contact details, shipping and return times, prices, your feed) before your next review request.
Dossier Comment Reflector
Years of student evaluation comments in; themes, before-and-after evidence for your course changes, fair quotes and a page-limited tenure reflection draft out.
Student Journey Check
A test student walks your online course after every update and tells you which step your students would get stuck on.
ACR Draft
Write the accessibility report (VPAT) a university asks for before it buys your software: scans plus a guided review, exported to Word.
Consent Leak Watch
Check that your shop's cookie banner really blocks trackers, and which plugin broke it.
Modulo Bias Microscope
Paste a random sampling function and see exactly how biased it is.
Data Structure City
A hash map, B-tree, skip list and LRU cache side by side, driven by one Redis-like console.
GPU Parallel Puzzler
Twelve kernel puzzles on a simulated GPU: warps, divergence, coalescing, bank conflicts.
Leap Second Lab
TAI, UTC, GPS, Unix and UT1 on one timeline, and what 23:59:60 does to your code.
Tamerlane Board
Timur's 14th-century chess with giraffes, war engines and citadels.
Tiny Brains League
Train the smallest Connect Four network you can and climb a ladder.
Pull the Pin
An 8-bit SAP-1 computer where the instructor breaks a chip and students find the fault.
Pluck Lab
A keyboard guitar synthesized live by Karplus-Strong, with the filter on screen.
Net Units
Measure how much code a change adds in syntax-level units instead of lines.
Study Buddy Matchmaker
Upload a gradebook CSV and get complementary study pairs with shared agendas.
Tetromino Arcade
A falling-block puzzle game with modern rules, seven modes, a computer opponent, replays and a daily challenge.
Lockstep Lab
Watch deterministic lockstep and rollback netcode work, and fail.
Edit Graph Lab
Diff as a shortest-path search, with Myers' algorithm animated.
Assignment Stress Test
Every output the scheduler could produce for a fork/wait snippet, and why the others are impossible.
Brocot Gear Finder
Gear trains for any ratio with continued fractions and the Stern-Brocot tree.
Fork Count
Every process, pipe and possible output of a fork/wait/pipe C snippet, deadlocks included.
Diagram Layout Engine
A from-scratch layout engine for Mermaid flowcharts, with every stage of the pipeline visible.
Letter Ledger
Recommendation-letter requests: a request link with your policy and FERPA release, encrypted packets, a deadline dashboard.
Code Viva
Short oral checks on each student's own submission, with questions anchored to their functions.
Outguess Me
Press F or J as randomly as you can while an oracle predicts you. You are less random than you think.
Program Alarm 1202
A playable model of the Apollo Guidance Computer's executive during the lunar descent.
Heap Arena Replay
Replay a malloc/free trace on a word-accurate heap under different allocator policies.
Reverse Minesweeper Studio
Paint a picture with mines and find out if it can be solved without guessing.
State Space Atlas
Every reachable state of Hanoi, sliding tiles, Klotski and Rush Hour, drawn as one graph.
Elevator Algorithm Lab
Write an elevator dispatch policy in JavaScript and run it against seeded traffic.
Where Does It Say
Questions about the syllabus answered only with verbatim quotes, or a refusal.
Cipher Ladder
Climb from Caesar to Vigenère to homophonic ciphers with live cryptanalysis tools.
Repo Weight Map
Drop a project folder in and see what is bloating it, with the .gitignore lines to fix it.
Agent Blast Radius
Drop in MCP configs and agent settings to see what each AI tool on your machine can reach.
Prompt Shrink Ray
Compress an LLM prompt with a live token estimate and a check that the keywords survived.
Summit Navigator
A conference program you can use in a hallway: day tabs, track filters, search, a starred personal agenda and a now-and-next banner in your own time zone.
Cron Cartographer
Any cron expression, RRULE or GitHub Actions schedule as a calendar heatmap of when it fires.
Type Witness
Watch the TypeScript compiler infer types, expression by expression.
Prompt Genome
Split a prompt into color-coded parts (role, task, constraint, format...) and lint it.
Code Analogy Forge
Three analogies for a piece of code or a CS concept, pitched at the audience you choose.
HAR Detective
Drag in a browser HAR file for a waterfall and a ranked, plain-English performance report.
Code Review Gauntlet
Race the clock to spot planted bugs and security holes.
Sound Sketchpad
Describe a sound effect in words and get playable audio with WAV export.
SQL Replay
Watch a SELECT execute step by step, each stage narrated.
UI Diff Lens
Two screenshots in, every changed region classified as layout, spacing, color, text and so on.
Migration Diff Narrator
Two versions of a schema in, every change marked safe, caution or breaking out.
Pathfinding Playground
Draw a grid and race BFS, Dijkstra, A* and friends across it.
Schema Storyteller
Paste a SQL, Prisma or JSON schema, get the data model in plain English plus missing keys and indexes.
Shortcut Sprint
Spaced-repetition drills for keyboard shortcuts in VS Code, Vim, Figma, Excel and more.
Game Palette Inspector
Check a palette against WCAG contrast and 8 kinds of color blindness, with replacements that keep the art style.
Accessibility Lens
Scan a public page against WCAG 2.1, then see it the way low-vision, color-blind, keyboard-only and screen-reader users do.
Chess TD
Run a chess tournament from your browser, even offline: Swiss and round-robin pairings by FIDE and US Chess rules, results by keyboard, standings with tiebreaks.
Emoji Lingua
English to emoji and back.
Mult Streak
Ten multiplications in a row wins a 24-hour crown.
MyChessMaster
For tournament players preparing for a specific opponent: where games went wrong, why, and drills from your own mistakes.
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