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Cryptab - Track the top 100 Cryptocurrencies in every new tab
Cash App - The easy way to send, spend, bank, and invest.
Blockchain Demo - Visual demonstration of blockchain technology
Stripe - Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes. Use Stripe’s payment platform to accept and process payments online for easy-to-use commerce solutions.
Frost - An open API for Blockchain timestamping
Solo - Personal kanban boards hosted on your own server