Creative Tools
24d ago
ContrastKit
Check WCAG contrast, then fix failing colors in one click.
Built with Claude Code
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Harmonia
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Harmonia
Watch the demo before you click
Interactive circle of fifths — hear real chords, explore every mode.
Built with OpenAI and Claude by Chris Pirillo, Harmonia turns the circle of fifths into a live music-theory playground: hover any key to illuminate its diatonic chords and hear authentic four-part voice leading instead of block chords, then snap chords onto a ribbon to build and loop full progressions across all seven modes. Tempo, swing, and looping are all adjustable — free in your browser with no account needed.
Stats update live — the feed never sleeps
Generated launch trailer
AIBuilt generated this launch kit automatically from arcade.pirillo.com/harmonia.html. No uploads, no editing — point us at the build and ship.
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