~/fun

Chess studio powered by TypeSafe System One AI: natural language moves, parallel evaluations, persona opponents, and classic match replay.

Multi-dimensional semantic explorer and intent pattern matrix for all 324 ECMAScript proposals.

Interactive field guide and quizzes for the 50 US states and India's 36 states & UTs.

Sleep cycle calculator. Find the best time to wake up or fall asleep.

Science-backed weight loss calculator. 10 metrics from 20+ peer-reviewed papers.

Test your calibration. How well do you estimate probabilities?

Pit AI models against each other. See who writes better answers.

Internet speed test. Quick bandwidth check from your browser.

Can you tell if it was written by a human or AI?

Music player and experiments with sound.

Record your screen or camera stream right from the browser.

Curated reading lists with visual flair.

Track goals and habits with a simple interface.

Calendar log. Keep track of what happened when.

Shape ideas into something tangible.

LaTeX renderer and editor. Write and preview math notation in real time.

Helps parents manage and support kids with ADHD.

Stock market and trading educational app for kids.

Universal Commerce Protocol demo.