The rising amount of visual medical data creates a need for new tools for retrieval and management of audiovisual documents. Content-based visual retrieval is such a technology, allowing the navigation of image databases without the use of text-based queries. This is used to support the finding of images for research and teaching, and also as a diagnostic aid in fields such as evidence-based medicine. Being a research domain, the exchange of system components and technologies is important for efficient development. Open Source software allows such an exchange through code.