Credits

All games on this site are original CalcoTools work, written for this site.

• Icons: Lucide (ISC licence).
• Typefaces: Inter and Fraunces via Google Fonts (SIL Open Font Licence).
• Memory Match and Mahjong Solitaire use standard Unicode emoji, rendered by your device's own emoji font.
• Five Letters uses a word list written for this site; Guess the Unit uses well-known public facts and measurements.
• Framework: Next.js and React (MIT).

No third-party game code, artwork or audio is used.