Circle

What it does

Build onchain with a trusted full-stack platform including Arc, CPN, and USDC. Power payments, trading, and access to the agentic economy.

Build on the full-stack platform designed to power trillions in economic activity — built for the AI era with Arc, the Economic OS for the internet. Circle’s full-stack platform provides the tools developers use to ship AI-powered applications and the financial primitives agents need to hold value, discover services, and transact programmatically. Circle Skills and Circle CLI give developers — and the agents working with them — a deterministic way to build on Circle’s infrastructure. Circle Wallets, Agent Wallets, USDC, and EURC let applications and agents hold and move value within defined guardrails. CCTP, Gateway, Nanopayments, Agent Marketplace, and Arc — the Economic OS for the…from circle.com

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  Circle2014 · circle.com · ▲91

  Bitcoin for the masses— store & use Bitcoin for free

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  Circle for Bitcoin2014 · circle.com · ▲94

  Store and use bitcoin from your phone

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  Circle Pay2016 · apps.apple.com · ▲5

  Send and Receive money instantly with no fees

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  Circle2023 · ▲75

  Buy, store, receive and send Bitcoin super fast.

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  Zelle2016 · zelle.com · ▲115

  Money-transfer app from the big banks and credit unions

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  Transfercar2014 · transfercarus.com · ▲148

  Free one-way rental cars for flexible travellers

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  SimCity, but with Permits▲912

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 2d ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 14d ago · tanzaniaeducationproject.org

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  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 15d ago · bigwords.page

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  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 9d ago · guitoro.com

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  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 13d ago · carrierexplode.com

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  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 23d ago · space.bl2.net

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  Brain.fm▲957

  Music for the brain to improve focus, meditation & sleep

  AI · 2015 · brain.fm

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  Something pointless I made▲747

  Life & fun · 2015 · dn.ht

• PA
  Parinfer – a simpler way to write Lisp▲674

  Parinfer - simpler Lisp editing

  Life & fun · 2015 · shaunlebron.github.io

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  Motion AI▲634

  Easily build chatbots to do anything, on any platform!

  AI · 2015 · motion.ai

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  f.lux for iOS▲596

  Auto adjust your iOS display based on the time of day

  Dev tools · 2015 · justgetflux.com

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  Fieldbook▲592

  Create a database, as easily as a spreadsheet

  Dev tools · 2015 · fieldbook.com