When is an open source license not an open source license? The recent rush to "Open Core Licensing" as defined by Andrew Lampitt, the business development director of JasperSoft, raises many questions as to the meaning and purpose of free and open source software. The terms "open source" and "free software" are often confused by companies who want to gain the benefits of a wider developer community. More often than not this has arisen from a misunderstanding of the full implications of "open source" and "free software", and how free software licensing works to the advantage of developers and the companies that are formed to market the software.