ERPNext frappe.io ↗

Wave ↗Finance & payments

Invoicing and accounting software for small businesses.

GnuCash ↗Finance & payments

Free open-source personal and small-business accounting software.

Odoo Community Edition ↗Productivity

Open-source ERP suite with project, invoicing and accounting modules.

Aiwyn Tax connector ↗Finance & payments

A Claude marketplace connector that uses a tax engine to back and correct Claude's tax calculations.

FreeAgent ↗Finance & payments

Online accounting and invoicing software for freelancers and small businesses.

FreeTaxUSA ↗Finance & payments

A US online tax filing service.

Stripe Issuing ↗Finance & payments

Stripe's API for programmatically issuing and controlling payment cards.

FedNow ↗Finance & payments

The US Federal Reserve's instant payment and settlement service.

Mercury ↗

An online banking service for businesses and individuals.

BLIK ↗

A Polish mobile payment system.

Wise ↗

An online money transfer and multi-currency account service.

Airwallex ↗

Financial platform offering virtual card issuing among other payment services.

Aiwyn Tax connector ↗

A Claude marketplace connector that uses a tax engine to back and correct Claude's tax calculations.

Allica Bank ↗

A UK bank serving small and medium-sized businesses.

Apple Pay ↗

Apple's mobile and online payment service.

Beancount ↗

Plain-text double-entry accounting system.

CME FedWatch Tool ↗

A CME Group tool showing market-implied probabilities of Fed rate changes.

Chase UK ↗

The UK retail bank of J.P. Morgan.

Chaum eCash ↗

David Chaum's blind-signature electronic cash system and its newer revival.

Current Account Switch Service ↗

A UK service that moves direct debits, balances and incoming payments to a new bank account.