For developers using Solaris operating system and coding in Java the Bloomberg API offers this library. Solaris users should be aware that the Solaris libraries can only be used with the Bloomberg Server API and B-Pipe data feed products and are not compatible with the Desktop API. The Bloomberg API provides free, unrestricted access to raw financial data on current market trades (either real-time or delayed), reference data on historical information, and records of intraday trading. As part of their Open Market Data Initiative the library is offered under a "free-use" license, which allows unrestricted access of the interface's header files, documentation, and programming examples.
The Open Exchange Rates API currently provides real-time, hourly-updated exchange rates and historical data for 161 world currencies that can be used in web and mobile applications, frameworks and with any programming language.