The Apache Open For Business Project is an enterprise automation software project that includes ERP, CRM, E-Business/E-Commerce, SCM, MRP, and CMMS/EAM functions. It is a foundation and starting point for enterprise solutions and can certainly be used out of the box, but is also great for creating specialized applications.
GFP is a Java/Swing personal finance manager that is translated to 10 languages and is being translated to more. It supports credit card, checking, and savings accounts. It has an intuitive GUI that makes it easy to learn and use. It has a budget feature and many reports to help on finance management. After some months of usage, GFP begins to try to predict your finance behavior for the configured type of transactions.
Bitcoin is a peer-to-peer electronic cash system that is completely decentralized, without the need for a central server or trusted parties. Users hold the crypto keys to their own money and transact directly with each other, with the help of a P2P network to check for double-spending.