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Markdown Previewer
Type Markdown and check the rendered result. Copy either the source or the preview.
Drone Simulator
Try drone movement, turning, ascent and descent using two keyboard control layouts.
Boat Docking Simulator
Try steering a small boat and docking, observing movement and distance to the shore.
Personal Watercraft Simulator
Try moving and steering a personal watercraft and observe speed and direction changes.
Aerial Work Platform Simulator
Operate an aerial platform’s boom and rotation to explore movement toward a working position.
Rough-Terrain Transporter Simulator
Drive a rough-terrain transporter and try carrying a load and stopping at the target.
Shovel Loader Simulator
Operate a loader’s drive and bucket to try carrying and unloading material.
Small Mobile Crane Simulator
A simplified simulation of a small mobile crane’s boom and suspended load.
Mobile Crane Simulator
Operate a mobile crane’s rotation, boom and load to try reaching a target position.
Crane / Derrick Simulator
Try crane and derrick lifting and movement while checking the load position.
Cargo Gear Simulator
Lift cargo and lower it onto the receiving area using cargo-handling equipment.
3D Coordinate Visualizer
Enter X, Y and Z coordinates. Rotate the view to inspect points and their plane projections.
Hierarchy Visualizer
Turn indented text into a line-drawn tree for folder structures and concept outlines.
Circle Visualizer
Arrange line-separated items around a circle, connect them and export a transparent PNG.
URL Capture Hub
Select an area of a shared screen, prepare its image on the clipboard and open your chosen URL.
ChatGPT Dev Stack Launcher
Choose your ChatGPT plugins and build a personal launcher for desktop or mobile.
Roulette
Name your options, spin the wheel and stop it when you choose.
Target-Controlled Roulette
An experimental wheel that stops at a preset number. Its destination can be controlled.
Geometric Visual Aura
A personal experiment with rotating geometric patterns. Pause and resume the movement.
SQL Syntax Map
Compare SQL operations and results using the same input. Switch between Snowflake and BigQuery.
Git / GitHub Story & gitGraph
Follow one project through basic commands, teamwork and history, with a story and gitGraph.
SQL function map
Search by name or task. Check English names, arguments, NULL behavior, SQL examples and results for Snowflake and BigQuery.
UI Fieldnotes
Compare web examples across 24 fields and try original UI components for your own page.
Domain Canvas Skill: connect screens, concepts and data
A guide to the Claude Code skill that connects screens, business concepts and ER diagrams.
CCCD: conditional forecasts of social structure
Explore gifts, reciprocity and memory in a social model. Forecast accuracy is unverified.
Loop Engineering / Recursive Governance
Examine AI agent improvement and governance through an analogy with Buddhist practice.
Yogācāra 51 Mental Factors
Look up 51 Yogācāra mental factors, their categories, eight-consciousness relationships and Sanskrit names.
Theravāda 52 Cetasikas
Look up 52 Theravāda mental factors by category and their original Pāli names.
Buddhism Concept Map
Explore Buddhist concepts with distinctions between early Buddhism, Theravāda, Mahāyāna and Yogācāra.
How can Tomabechi theory help us read Buddhist teachings?
Compare Buddhist teachings with Tomabechi’s mathematical models. Separate events, interpretations, assumptions and empirical evidence, with a counterexample and reading checks.