FreeB is the worlds first and only GPL Medical Bill Formatting Engine. FreeB2 is a third-generation billing engine, it is capable of interfacing with any Practice Management System or Electronic Medical Record to provide the capability to generate medical bills. The current formats include HCFA 1500 paper and X12 837p electronic billing. However other formats including UB-92 and X12 837i can be created without reprogramming FreeB. FreeB2 has unique features not found in other billing engines.