The OpenMAMA Project provides a vendor neutral integration layer for a variety of message oriented middleware systems and messaging protocols. It enables an application to employ a range or middleware systems simultaneously or switch between them at will while developing with a single open source API. Adding or changing the messaging stack does not require lengthy and expensive code changes. In addition to providing a single API for messaging, OpenMAMA implements a number of advanced features that simplify writing many messaging applications including those that consume financial market data. The OpenMAMA project includes big names in the financial services sector such as Bank of America, Merrill Lynch, J.P. Morgan and NYSE Technologies, among others. OpenMAMA is an open source project hosted at The Linux Foundation.