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Crypto invoicing that settles to wallets you already control — no processor float.
Cardcove
Digital business card with QR code and contact file — one-time €15, no subscription. Built by Focus2Grow.
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Open-source chess: play the critical position of a famous game vs a friend, a rated opponent or Stockfish, then see where you left the grandmaster's line. 50+ legends, 3,600+ openings, free.
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Tax, portfolio management and a free UK buy-to-let deal calculator.
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Memdeklaro
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Free Arabic calculators for Saudi personal finance — estimates, not loans.
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