The most important challenge of i2b2 is to disseminate the computational tools, methodologies, biomedical data sets and educational materials widely within the biomedical and computational research communities. To do so we have committed to make all the resources freely available to all interested parties. In this section you will find access to all of these. We would appreciate referencing i2b2 if you do choose to use these resources. The preferred method of citation or reference is provided in each subsection. Please note that for some resources (e.g. software) the use of the resource requires accepting a specific (e.g. OpenSource) license. Please read the particulars of each license to see how it might impact your current and future use.