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Copyfree Works

The license status of some works may be more complex than it at first appears here. In some cases, the license status listed for a given work is the "primary" license under which it is distributed. In several cases, parts of the work may be distributed under other licenses -- potentially even non-copyfree licenses.

Where present, descriptions are typically drawn from the claims of the projects themselves, and represent neither claims nor opinions of the Copyfree Initiative. Inclusion here (with or without description) does not constitute, and should not be inferred as, endorsement of any project.

Listings are presented for informational purposes only, and no representation is made as to the accuracy or utility of any information provided. Use at your own risk.

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Bitcoindpermalink

License Reference

This project provides the reference implementation for a Bitcoin library, daemon, and command-line wallet.

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btcdpermalink

License Reference

As an alternative full-node implementation of the bitcoin protocol written in Go, btcd provides an alternative to bitcoind that can substantially improve the diversity and resilience of the bitcoin ecosystem and infrastructure.

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dcrctl [1]permalink

License Reference

The dcrctl client is used to control dcrd and dcrwallet daemons, providing the command line interface for both Decred node and wallet functionality.

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dcrd [1]permalink

License Reference

Decred is a blockchain-based cryptocurrency with a strong focus on community input, open governance, and sustainable funding for development, utilizing hybrid proof-of-work and proof-of-stake mining to ensure small groups cannot dominate transaction flow or control development without community input, and dcrd is the node daemon.

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dcrwallet [1]permalink

License Reference

The dcrwallet daemon handles wallet functionality decoupled from user interface and automation development, providing an RPC interface for multiple UIs.

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Decred Mobile Wallet [1]permalink

License Reference

Decred Mobile Wallet, or dcrandroid, is a decred wallet for Android that runs on top of dcrwallet, the official Decred wallet daemon.

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decrediton [1]permalink

License Reference

The decrediton wallet is a cross-platform GUI Decred front end for the dcrwallet daemon on the back end.

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Foxtrotpermalink

License Reference

Foxtrot is a simple and secure routing network based on bitcoin cryptography. Foxtrot enables easy p2p communications and has built-in mechanisms for peer discovery, creation of services addressable by public keys, and establishing encrypted connections.

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Litecoinpermalink

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Makopermalink

License Reference

Mako is a from-scratch bitcoin reimplementation, written in "almost-C89" (i.e. it can be compiled by a C89 compiler if <stdint.h> is available -- no other C99 features are used).

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Namecoinpermalink

License Reference

Namecoin is an experimental open-source technology which improves decentralization, security, censorship resistance, privacy, and speed of certain components of the Internet infrastructure such as DNS and identities.

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PostgreSQL Blockchain Extensionpermalink

License Reference

PostgreSQL Blockchain Extension is a C language Postgres extension that provides Bitcoin blockchain functionality.

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Urbit [1]permalink

License Reference

Urbit is secure decentralized P2P "personal server platform" that runs on any existing Unix OS. The platform seeks to deconstruct the client-server model in favor of a federated network of personal servers with a consistent digital identity. Its components include Nock and Hoon programming languages.

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