BitcoinKeychains

Cryptographically Awesome Keychains and Keyrings

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PassGuardian

Store and share your secrets safely by splitting them into cryptographically-secure pieces. To reconstruct the original, combine a specific number of these pieces. It's simple, secure, and free.

Bitcoin Charts API

Bitcoincharts provides a simple API to most of its data. You can use this API to include markets data in your websites, mobile apps or desktop applets.

Blockchain.info

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