Bitcoin itself is an open-source project. Today there are a number of teams working on Bitcoin Cash implementations, as well as eco-system products such as wallets, SPV nodes, clients, payment solutions and more.

We list the most popular open source projects here, with links to the relevant github repositories:

Blockchain APIs can help developers quickly knock up applications by utilising existing infrastructure and data streams within the eco-system. For example, many developers, don't need to actually host their own node, because some APIs provide all of the essential tools required to securely interact with the blockchain.